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Angiosperm:

Upper division of the plant kingdom, comprising the flowering plants commonly known, their reproductive organs are in flowers. Have seeds that develop in ovaries closed.

Annual plant:

One who lives a single growing season, then die. Lacks deep underground stem and roots are very fine.

Anorectic:

A substance that decreases appetite.

Anoxibiotic:

See Anaerobe.

Antacid:

A substance that neutralizes the excess acidity produced in the stomach.

Antagonist:

A substance that can reduce or eliminate the effect of another.

Anthelmintics:

Plant that acts effectively against intestinal worms.

Anther:

Part of the stamen containing the pollen. Usually consist of two parts called nests.

Anthesis:

Period in which flower buds open. Flowering.

Anthraquinones:

Group of orange and red pigments in lichens, fungi and higher plants.

Anti-aphrodisiac:

Sexual appetite is reduced.

Anti-asthmatic:

A substance that acts against bronchial spasms that accompany asthma.

Anti-diabetic:

View Hypoglycemic.

Anti-edematous:

Preventing edema.

Anti-gastralgia:

A substance that counteracts stomach pain.

Anti-inflammatory:

A substance that prevents or stops the inflammation.

Anti-migraine:

That prevents migraines.

Anti-pyretic:

A substance that can reduce or relieve fever.

Anti-scorbutic:

A substance that prevents the development of scurvy.