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词汇 peristome
释义

Definition of peristome in English:

peristome

noun ˈpɛrɪstəʊmˈpɛrəˌstoʊm
  • 1Zoology
    The parts surrounding the mouth of various invertebrates.

    〔动〕(无脊椎动物的)口围,围口部,口缘

    Example sentencesExamples
    • The peristome can seem quite large.
    • Other mature modifications, such as change in the shape of the peristome, are also inconsistently observed in Paleozoic ammonoids.
    • The autozooids have small apertures and often preserve long peristomes inclined at an acute angle to the colony surface.
    • Spines and tube feet surrounding the peristome function in locomotion, burrowing, and food-gathering.
    • Ammonites are complete, many with preserved peristomes.
  • 2Botany
    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

    Example sentencesExamples
    • The sporophytes also develop peristomes and a spongy layer.

Origin

Late 18th century: from modern Latin peristoma, from Greek peri- 'around' + stoma 'mouth'.

Definition of peristome in US English:

peristome

nounˈperəˌstōmˈpɛrəˌstoʊm
Zoology
  • 1The parts surrounding the mouth of various invertebrates.

    〔动〕(无脊椎动物的)口围,围口部,口缘

    Example sentencesExamples
    • The peristome can seem quite large.
    • Ammonites are complete, many with preserved peristomes.
    • Spines and tube feet surrounding the peristome function in locomotion, burrowing, and food-gathering.
    • Other mature modifications, such as change in the shape of the peristome, are also inconsistently observed in Paleozoic ammonoids.
    • The autozooids have small apertures and often preserve long peristomes inclined at an acute angle to the colony surface.
    1. 1.1Botany 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
      Example sentencesExamples
      • The sporophytes also develop peristomes and a spongy layer.

Origin

Late 18th century: from modern Latin peristoma, from Greek peri- ‘around’ + stoma ‘mouth’.

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