Definition of peristome in English:


Syllabification: per·i·stome
Pronunciation: /ˈperəˌstōm


  • 1The parts surrounding the mouth of various invertebrates.
    More example sentences
    • Spines and tube feet surrounding the peristome function in locomotion, burrowing, and food-gathering.
    • The peristome can seem quite large.
    • The autozooids have small apertures and often preserve long peristomes inclined at an acute angle to the colony surface.
  • 1.1 Botany A fringe of small projections around the mouth of a capsule in mosses and certain fungi.
    More example sentences
    • The sporophytes also develop peristomes and a spongy layer.


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

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