Category: A
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Adenophorous
Glandular [old-fashioned term, not recommended].
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Adaxial
The side of an organ towards the axis on which it is inserted, (e.g. the upper surface of a leaf). Towards the axis, referring to the surface of an organ that is closest to the axis in bud. Toward the main axis; opposite of abaxial.
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Adapical
Towards the apex [unusual term in botany].
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Acyclic
Spiral, not in whorls. Without a cycle.
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Acute
Sharp, sharply pointed, the margins near the tip being almost straight and forming an angle of <90°. Denoting the swift onset and course of a disease. An illness that comes on quickly, has severe symptoms, and a generally short duration, e.g., measles or colds. The opposite of chronic. Having a sudden onset, characterized by sharpness,…
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Acuminate
Tapering to a long tip (usually of leaf tips). Tapering gradually to an extended point. With a elongated, tapering point set off rather shortly from the main body. An acute apex in which the sides are concave and taper to an extended point. Tapering to a point.
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Acumen
A rather abruptly tapering point from an otherwise rounded or obtuse apex.
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Aculei
Sharp points, prickles.
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Aculeate
Armed with prickles (as distinct from thorns).
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Active
In growing condition. Adjective applied to a medicinally potent herb in a blend. Lively and energetic. (Of a disease) having an effect on a patient. (Of a drug) having medicinal effect.