peristome

peristome
[ˈpɛrɪstəʊm]
noun
  1. (Zoology)the parts surrounding the mouth of various invertebrates
    (动)(无脊椎动物的)口围,围口部,口缘
    ■(Botany)a fringe of small projections around the mouth of a capsule in mosses and certain fungi
    (植)(藓类的)蒴齿(层),(某些真菌的)子实竭
语源
  1. late 18th cent.: from modern Latin peristoma, from Greek peri- 'around' + stoma 'mouth'
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