Similarly in Botany.

Botany. One of the cellular or tubular structures composing the vascular system of plants and having the function of containing or carrying sap…

Biology. A cavity, sac, or channel in a living organism which contains air; esp. a trachea or respiratory tube in an insect; an air-filled bladder…

A small tube; a minute tubular structure in an animal or plant body, as the Malpighian or uriniferous tubules of the kidney, the dentinal tubules…

= vesicle, n. 1. Usually in plural.

Physiology and Botany. A vessel involved in the physiological process of absorption; a lacteal or lymphatic (in an animal); a xylem vessel (in a…

Botany. A small sac or bladder containing air, found on parts of plants growing in water or wet soil. Obsolete.

Of parts, organs, etc.: essential or necessary to life; performing the functions indispensable to the maintenance of life.

Botany. A spiral vessel in plants.

Botany. (See quots.)

A small cavity or vesicle in organic tissue or protoplasm, frequently containing some fluid.

Biology. A thin-walled hollow organ or cavity in an animal body (or plant) containing a liquid secretion; a bladder, sac, vesicle.