• Webster's Revised Unabridged Dictionary
    • n. pl Polystomata (Zoöl) A division of trematode worms having more two suckers. Called also Polystomea and Polystoma.
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Century Dictionary and Cyclopedia
    • polystomata The sponges or Porifera, as metazoie organisms contrasted with all other Metazoa, or Monostomata: so called from their many mouths or oscula.—.
    • polystomata In Saville Kent's system of classification, one of four sections of Protozoa, consisting of the suctorial or tentaculiferous animalcules, or the acinetiform infusorians, having many tentacular organs, each of which serves as a tubular sucking-mouth: contrasted with Eustomata, Discostomata, and Pantostomata. The group is oftener called Tentaculifera.
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Webster's Revised Unabridged Dictionary
NL., from Gr. poly`s many + , , mouth