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单词 peristome
释义

WordReference Random House Unabridged Dictionary of American English © 2024
per•i•stome  (perə stōm′),USA pronunciation n. 
  1. Botanythe one or two circles of small, pointed, toothlike appendages around the orifice of a capsule or urn of mosses, appearing when the lid is removed.
  2. Zoologyany of various structures or sets of parts that surround or form the walls of a mouth or mouthlike opening.
  • Neo-Latin peristoma. See peri-, -stome
  • 1790–1800;
per′i•stomal, per•i•sto•mat•ic  (per′ə stə matik),USA pronunciation per′i•stomi•al, adj. 
Collins Concise English Dictionary © HarperCollins Publishers::
peristome /ˈpɛrɪˌstəʊm/ n
  1. a fringe of pointed teeth surrounding the opening of a moss capsule
  2. any of various parts surrounding the mouth of invertebrates, such as echinoderms and earthworms, and of protozoans
Etymology: 18th Century: from New Latin peristoma, from peri- + Greek stoma mouth
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