This Western Herbalism Glossary is useful for navigating the world of herbal wellness, which can be overwhelming, especially with the many specialized terms used to describe the actions and effects of plants. This glossary is designed to serve as a comprehensive, easy-to-understand reference for herbalists, wellness enthusiasts, and curious beginners alike. Each entry explains the herbal action, its purpose, and includes examples of commonly used plants so you can connect the terminology to real-world applications. Whether you’re exploring herbs for digestion, stress support, immune health, or beyond, this resource will help you make informed and empowered choices on your holistic wellness journey.

Adaptogens
Herbs that help the body adapt to physical, emotional, and environmental stress. They support resilience by balancing the HPA (hypothalamic-pituitary-adrenal) axis (stress response system) and energy metabolism. Adaptogens promote overall vitality, endurance, and recovery.
Examples: Ashwagandha (Withania somnifera), Rhodiola (Rhodiola rosea), Holy Basil (Ocimum tenuiflorum).

Alteratives
Herbs that gradually restore proper function to the body. They support natural channels of elimination (liver, kidneys, lungs, skin, lymph, and bowels) while improving nutrient absorption and tissue health. Traditionally known as “blood cleansers.”
Examples: Burdock Root (Arctium lappa), Yellow Dock (Rumex crispus), Red Clover (Trifolium pratense).

Amphoretics
Herbs that normalize the function of a system or organ, stimulating it when sluggish and calming it when overactive. Amphoretics help bring balance and harmony to organs such as the thyroid, nervous system, or immune system.
Examples: Licorice Root (Glycyrrhiza glabra), Ashwagandha (Withania somnifera).

Analgesics
Herbs that reduce the sensation of pain. They may act by calming the nervous system, easing inflammation, relaxing muscle spasms, or soothing irritated tissues. Analgesics can be applied internally or externally.
Examples: Willow Bark (Salix alba), Turmeric (Curcuma longa), Valerian (Valeriana officinalis).

Anodynes
A synonym for analgesics, traditionally used to describe herbs that soothe or ease pain. The term anodyne often conveys gentle relief rather than strong numbing, and is commonly found in historical herbal texts.
Examples: Chamomile (Matricaria chamomilla), Peppermint (Mentha piperita). See also: Analgesics.

Anthelmintics
A broad term for herbs that eliminate intestinal worms and parasites. They may act either by expelling them (vermifuges) or killing them outright (vermicides). Often combined with digestive or carminative herbs to ease discomfort.
Examples: Wormwood (Artemisia absinthium), Garlic (Allium sativum), Clove (Syzygium aromaticum). See also: Vermifuges, Vermicides.

Anticatarrhals
Herbs that reduce the formation of, or promote the elimination of, excess mucus and phlegm—especially from the respiratory tract. They are common in formulas for colds, sinus infections, and allergies. Distinct from expectorants, which focus on expelling mucus that is already present.
Examples: Eyebright (Euphrasia officinalis), Mullein (Verbascum thapsus), Marshmallow Root (Althaea officinalis). See also: Expectorants.

Anti-inflammatories
Herbs that reduce inflammation in the body. Some act locally on specific tissues, while others work systemically to calm inflammatory processes and support healing.
Examples: Turmeric (Curcuma longa), Ginger (Zingiber officinale), Boswellia (Boswellia serrata).

Antimicrobials
Herbs that inhibit the growth or activity of microbes such as bacteria, fungi, or viruses. Some are broad-spectrum, while others are specific to a type of microorganism.
Examples: Garlic (Allium sativum), Thyme (Thymus vulgaris), Goldenseal (Hydrastis canadensis).

Antioxidants
Substances that protect the body from oxidative stress by neutralizing free radicals. They help slow cellular damage, support healthy aging, and protect tissues from degeneration.
Examples: Green Tea (Camellia sinensis), Rosemary (Rosmarinus officinalis), Grape Seed Extract (Vitis vinifera).

Antipyretics
Herbs that help reduce elevated body temperature. They may promote sweating, cool tissues, or address the underlying cause of fever, such as infection or inflammation.
Examples: Elderflower (Sambucus nigra), Yarrow (Achillea millefolium), Peppermint (Mentha piperita). See also: Febrifuge.

Antirheumatics
Herbs that relieve symptoms of arthritis and other joint conditions. They may reduce pain, ease stiffness, and improve mobility by addressing inflammation and circulation in the joints.
Examples: Turmeric (Curcuma longa), Ginger (Zingiber officinale), Devil’s Claw (Harpagophytum procumbens).

Antispasmodics
Herbs that relax and ease involuntary muscle spasms. They may act on smooth muscles (digestive or respiratory tract) or skeletal muscles.
Examples: Peppermint (Mentha piperita), Cramp Bark (Viburnum opulus), Valerian (Valeriana officinalis).

Antitussives
Herbs that calm the cough reflex, reducing the frequency or severity of coughing. They may soothe irritated tissues or quiet nervous system activity involved in coughing.
Examples: Marshmallow Root (Althaea officinalis), Licorice Root (Glycyrrhiza glabra), Coltsfoot (Tussilago farfara).

Aphrodisiacs
Herbs that support sexual vitality and desire. They may nourish reproductive tissues, improve circulation, balance hormones, or directly stimulate arousal.
Examples: Maca (Lepidium meyenii), Damiana (Turnera diffusa), Horny Goat Weed (Epimedium spp.).

Astringents
Herbs that tighten and tone tissues, reducing excess secretions, discharges, or bleeding. Astringency is often due to tannins, which draw tissues together by binding proteins.
Examples: Witch Hazel (Hamamelis virginiana), Oak Bark (Quercus spp.), Yarrow (Achillea millefolium).

Bitters
Herbs with a bitter taste that stimulate digestive function. Bitters trigger reflexes from the taste buds, signaling the brain and activating the vagus nerve. This enhances saliva, stomach acid, bile, and enzyme secretion while gently increasing peristalsis.
Examples: Gentian (Gentiana lutea), Dandelion Root (Taraxacum officinale), Wormwood (Artemisia absinthium).

Bronchodilators
Herbs that relax and widen the bronchi—the major airways leading into the lungs. By easing constriction, bronchodilators support easier breathing, making them useful for conditions with restricted airflow.
Examples: Mullein (Verbascum thapsus), Lobelia (Lobelia inflata), Coltsfoot (Tussilago farfara).

Cardiotonics
Herbs that support and strengthen the heart and circulatory system. They may improve the force of heart contractions, regulate rhythm, enhance circulation, and nourish cardiac tissues. Some cardiotonics gently stimulate or calm the heart as needed, and are typically used long-term.
Examples: Hawthorn (Crataegus spp.), Motherwort (Leonurus cardiaca), Lemon Balm (Melissa officinalis).

Carminatives
Aromatic herbs rich in essential oils that relax digestive muscles, reduce spasms, and ease discomfort from gas or bloating.
Examples: Fennel (Foeniculum vulgare), Peppermint (Mentha piperita), Ginger (Zingiber officinale).

Cerebral Vasodilators
A specialized type of vasodilator that increases blood flow specifically to the brain. This action may support cognitive function, memory, concentration, and mental clarity.
Examples: Ginkgo (Ginkgo biloba), Gotu Kola (Centella asiatica), Rosemary (Rosmarinus officinalis). See also: Vasodilators.

Cholagogues
Herbs that promote the release of bile from the liver and gallbladder into the digestive tract. They support fat digestion and elimination, but should be avoided in certain liver or gallbladder conditions.
Examples: Dandelion Root (Taraxacum officinale), Artichoke Leaf (Cynara scolymus), Yellow Dock (Rumex crispus). See also: Choleretics.

Choleretics
A type of cholagogue that specifically stimulates bile production in the liver.
Examples: Milk Thistle (Silybum marianum), Gentian (Gentiana lutea), Barberry (Berberis vulgaris). See also: Cholagogues.

Demulcents
Moistening, soothing herbs that coat and protect irritated or inflamed tissues.
Examples: Marshmallow Root (Althaea officinalis), Slippery Elm (Ulmus rubra), Licorice Root (Glycyrrhiza glabra).

Depuratives
Herbs that enhance detoxification and elimination, reducing the buildup of metabolic waste in the body. Traditionally called alteratives or “blood purifiers,” depuratives are often used to support chronic skin conditions, arthritis, and other systemic imbalances.
Examples: Burdock Root (Arctium lappa), Red Clover (Trifolium pratense), Yellow Dock (Rumex crispus). See also: Alteratives.

Diaphoretics
Herbs that promote circulation to the surface of the body and encourage sweating. By opening pores, they help regulate body temperature and are often used during fevers to support natural healing.
Examples: Elderflower (Sambucus nigra), Ginger (Zingiber officinale), Yarrow (Achillea millefolium). See also: Refrigerants.

Diuretics
Herbs that increase urine production, promoting the elimination of excess water and waste products through the kidneys. They may help relieve fluid retention, support urinary health, and lower blood pressure.
Examples: Dandelion Leaf (Taraxacum officinale), Nettle Leaf (Urtica dioica), Corn Silk (Zea mays).

Emmenagogues
Herbs that stimulate or regulate menstrual flow. They may work by improving circulation to the pelvic area, balancing hormones, or gently stimulating uterine activity. (Note: some emmenagogues are contraindicated during pregnancy.)
Examples: Ginger (Zingiber officinale), Shepherd’s Purse (Capsella bursa-pastoris), Angelica (Angelica archangelica).

Expectorants
Herbs that help loosen and expel mucus from the lungs and upper respiratory tract. They may thin mucus, stimulate productive cough, or soothe airway irritation.
Examples: Mullein (Verbascum thapsus), Licorice Root (Glycyrrhiza glabra), Elecampane (Inula helenium). See also: Anticatarrhals.

Febrifuge
Another term for antipyretic—herbs that reduce fever by promoting sweating, cooling tissues, or addressing underlying causes of fever.
Examples: Elderflower (Sambucus nigra), Yarrow (Achillea millefolium), Peppermint (Mentha piperita). See also: Antipyretics.

Galactagogues
Herbs that promote and support the flow of breast milk in nursing mothers. They may work by increasing prolactin levels, improving hydration, or nourishing lactation tissues.
Examples: Fenugreek (Trigonella foenum-graecum), Fennel (Foeniculum vulgare), Blessed Thistle (Cnicus benedictus). See also: Lactifuges.

Hepatics
Herbs that support and protect liver function. They may help decongest the liver, enhance detoxification, and improve bile flow, supporting healthy digestion and metabolism.
Examples: Milk Thistle (Silybum marianum), Dandelion Root (Taraxacum officinale), Yellow Dock (Rumex crispus). See also: Choleretics, Cholagogues.

Hypnotics
Herbs that promote deep, restorative sleep. They may act through relaxing volatile oils that calm the limbic system, or through alkaloids that act on the central nervous system.
Examples: Valerian (Valeriana officinalis), Hops (Humulus lupulus), Passionflower (Passiflora incarnata). See also: Sedatives, Nervines.

Hypolipidemics
Herbs that help lower blood lipid levels. They may reduce cholesterol and triglycerides by improving fat metabolism, supporting liver function, or enhancing bile secretion.
Examples: Garlic (Allium sativum), Artichoke Leaf (Cynara scolymus), Fenugreek (Trigonella foenum-graecum).

Hypotensives
Herbs that lower high blood pressure. They may act by dilating blood vessels, relaxing smooth muscle, improving circulation, or calming the nervous system.
Examples: Hawthorn (Crataegus monogyna), Olive Leaf (Olea europaea), Lemon Balm (Melissa officinalis). See also: Vasodilators, Cerebral Vasodilators.

Immunomodulants
Herbs that balance and restore proper immune function, whether overactive or underactive. Often used in chronic immune conditions, including autoimmunity. Many immunomodulants are also adaptogens.
Examples: Astragalus (Astragalus membranaceus), Reishi Mushroom (Ganoderma lucidum), Echinacea (Echinacea purpurea). See also: Immunostimulants, Adaptogens.

Immunostimulants
Herbs that enhance immune activity to defend against infection. They may activate nonspecific defenses (like macrophages) or specific immune responses (antibody or T-cell activity). Often used in acute infections.
Examples: Echinacea (Echinacea purpurea), Elderberry (Sambucus nigra), Garlic (Allium sativum). See also: Immunomodulants, Antimicrobials.

Lactifuges (Antilactagogues)
Herbs that reduce or suppress the production and flow of breast milk. They may act hormonally, astringently, or by shifting the body’s energetic balance away from lactation. Often used during weaning or when milk production is excessive.
Examples: Sage (Salvia officinalis), Peppermint (Mentha piperita), Parsley (Petroselinum crispum). See also: Galactagogues.

Laxatives
Herbs that encourage or stimulate bowel movements. Their action varies:

• Bulk-forming laxatives: add fiber and volume to stool. Example: Psyllium (Plantago ovata).
• Osmotic laxatives: draw water into the colon. Example: Senna (Senna alexandrina).
• Stimulating laxatives: increase intestinal contractions. Example: Cascara Sagrada (Rhamnus purshiana).
• Lubricating or soothing laxatives: ease passage by coating or softening stool. Example: Marshmallow Root (Althaea officinalis).

Nervines
Herbs that support, soothe, and nourish the nervous system. Nervines can have calming, relaxing, or gently stimulating effects, depending on the plant. Often used to ease stress, anxiety, and emotional tension.
Examples: Chamomile (Matricaria recutita), Lemon Balm (Melissa officinalis), Oats (Avena sativa). See also: Sedatives, Hypnotics.

Nervine Trophorestoratives
A specific class of trophorestoratives that deeply nourish, rebuild, and restore the nervous system over time. Unlike simple nervines, which primarily calm or relax, nervine trophorestoratives strengthen the integrity of the nervous system itself, helping with exhaustion, burnout, or long-term stress recovery.
Examples: Oats (Avena sativa), Skullcap (Scutellaria lateriflora), Ashwagandha (Withania somnifera). See also: Nervines, Trophorestoratives.

Refrigerants
Herbs that have a cooling effect on the body, whether through energetic qualities or by encouraging heat release. Often used for fevers, hot flashes, and inflammatory conditions. Refrigerants may work by promoting diaphoresis (sweating) or by soothing overheated tissues directly.
Examples: Peppermint (Mentha piperita), Lemon Balm (Melissa officinalis), Chamomile (Matricaria recutita). See also: Diaphoretics.

Relaxants
Herbs that ease physical and emotional tension, promote relaxation, and calm the body and mind. They may act on muscles, nerves, or both.
Examples: Valerian (Valeriana officinalis), Lemon Balm (Melissa officinalis), Kava (Piper methysticum). See also: Nervines.

Rubefacients
Herbs applied externally to increase local blood flow by causing mild irritation and capillary dilation. They are used to relieve congestion, warm tissues, ease pain, and promote healing in the affected area.
Examples: Ginger (Zingiber officinale), Cayenne (Capsicum annuum), Mustard (Brassica nigra).

Sedatives
Herbs that calm nervous system activity and reduce tension. They may ease anxiety, pain, or spasms, and in higher doses, can promote sleep.
Examples: Hops (Humulus lupulus), Chamomile (Matricaria recutita), Passionflower (Passiflora incarnata). See also: Hypnotics, Nervines.

Sialogogues
Herbs that stimulate saliva production. They may relieve dry mouth, aid digestion, support gum health, and help prevent oral infections.
Examples: Marshmallow Root (Althaea officinalis), Licorice (Glycyrrhiza glabra), Lemon Balm (Melissa officinalis).

Stimulants
Herbs that increase physiological or nervous system activity. They may raise energy, circulation, metabolism, or mental alertness.
Examples: Coffee (Coffea arabica), Guarana (Paullinia cupana), Ginger (Zingiber officinale).

Stomachics
Herbs that strengthen and support digestive function. They can stimulate appetite, enhance gastric secretions, and promote healthy digestion.
Examples: Gentian (Gentiana lutea), Chamomile (Matricaria recutita), Ginger (Zingiber officinale). See also: Bitters, Carminatives.

Thymoleptics
Herbs that uplift and stabilize mood. Often used as natural antidepressants, helping to ease low mood, support emotional balance, and promote mental clarity.
Examples: St. John’s Wort (Hypericum perforatum), Lemon Balm (Melissa officinalis), Rosemary (Rosmarinus officinalis).

Tonics
Herbs that strengthen and restore vitality to a specific organ, system, or the body as a whole. Tonics promote general resilience, energy, and balanced function over time.
Examples: Nettle (Urtica dioica), Ashwagandha (Withania somnifera), Eleuthero (Eleutherococcus senticosus).

Trophorestoratives
Herbs that have a targeted healing and restorative action on a specific organ or tissue, gradually nourishing and returning it to optimal function.
Examples: Milk Thistle (Silybum marianum) for liver, Oats (Avena sativa) for nervous system, Nettle (Urtica dioica) for blood and kidneys.

Uterine Tonics
Herbs that tone and strengthen uterine muscles. They may support menstrual health, prepare the uterus for childbirth, or assist postpartum recovery.
Examples: Red Raspberry Leaf (Rubus idaeus), Shepherd’s Purse (Capsella bursa-pastoris), Cramp Bark (Viburnum opulus).

Vasodilators
Herbs that relax and widen blood vessels, improving circulation and reducing blood pressure.
Examples: Hawthorn (Crataegus spp.), Garlic (Allium sativum), Ginkgo (Ginkgo biloba). See also: Cerebral Vasodilators.

Vermifuges
Herbs that expel worms and parasites from the body by paralyzing or otherwise disabling them so they can be passed naturally.
Examples: Wormwood (Artemisia absinthium), Male Fern (Dryopteris filix-mas). See also: Anthelmintics, Vermicides.

Vermicides
Herbs that directly kill intestinal worms and parasites. Often used in combination with vermifuges to both destroy and expel.
Examples: Garlic (Allium sativum), Clove (Syzygium aromaticum). See also: Anthelmintics, Vermifuges.

Vulneraries
Herbs that support wound healing when used externally or internally. They may stop bleeding, promote scab formation, reduce inflammation, and speed tissue repair. Mucilaginous vulneraries are especially soothing to irritated tissues.
Examples: Comfrey (Symphytum officinale), Calendula (Calendula officinalis), Plantain (Plantago major).