収しゅう縮しゅく胞ほうMeanings1nouncontractile vacuolebiologyA specialized organelle in some single-celled organisms, especially protists, that expels excess water.ゾウリムシの収しゅう縮しゅく胞ほうは、体たい内ないの水すい分ぶん調ちょう節せつに重じゅう要ような役やく割わりを果はたす。The contractile vacuole of Paramecium plays an important role in regulating water balance.
