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The Collaborative International Dictionary
Polystome

Polystome \Pol"y*stome\, a. [Gr. ? many-mouthed; poly`s + sto`ma mouth.] (Zo["o]l.) Having many mouths.

Polystome

Polystome \Pol"y*stome\, n. (Zo["o]l.) An animal having many mouths; -- applied to Protozoa.

Wiktionary
polystome

n. (context zoology English) Any animal with many mouths.