VACUOLE
vacuole
(noun) a tiny cavity filled with fluid in the cytoplasm of a cell
Source: WordNet® 3.1
Etymology
Noun
vacuole (plural vacuoles)
(cytology) A large membrane-bound vesicle in a cell's cytoplasm.
Source: Wiktionary
Vac"u*ole, n. Etym: [L. vacuus empty: cf. F. vacuole.] (Biol.)
Definition: 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. (Zoöl.) See under Contractile, and see Illusts. of
Infusoria, and Lobosa.
– Food vacuole. (Zoöl.) See under Food, and see Illust. of
Infusoria.
Source: Webster’s Unabridged Dictionary 1913 Edition