Contractile vacuole Meaning, Definition & Usage

Definitions
  1. (Zoöl.), a pulsating cavity in the interior of a protozoan, supposed to be excretory in function. There may be one, two, or more.
Definitions
  1. . (Zoöl.) See under Contractile, and see Illusts. of Infusoria, and Lobosa.

Webster 1913