vacuole : Idioms & Phrases
Contractile vacuole
(Zoöl.) , a pulsating cavity in the interior of a protozoan, supposed to be excretory in function. There may be one, two, or more.
Webster 1913
Food vacuole
(Zoöl.) , one of the spaces in the interior of a protozoan in which food is contained, during digestion.
