Vacuole \Vac"u*ole\, n. [L. vacuus empty: cf. F. vacuole.]

(Biol.) A small air cell, or globular space, in the interior of organic cells, either containing air, or a pellucid watery liquid, or some special chemical secretions of the cell protoplasm.

Contractile vacuole. (Zo["o]l.) See under Contractile, and see Illusts. of Infusoria, and Lobosa.

Food vacuole. (Zo["o]l.) See under Food, and see Illust. of Infusoria.

Source: Webster's Revised Unabridged Dictionary (1913)