from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Plural form of peristoma.

from The Century Dictionary and Cyclopedia

  • In Lamarck's classification, a family of trachelipod gastropods, having the aperture surrounded by a continuous lip or peristome, and including the genera Valvata, Paludina, and Ampullaria, now dissociated in different families. Also Peristomidæ.—2. [l. c.] Plural of peristoma.


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