Definition of peristome in English:
peristome
noun ˈpɛrɪstəʊmˈpɛrəˌstoʊm
1Zoology
The parts surrounding the mouth of various invertebrates.
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.
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.
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.
- 1.1Botany A fringe of small projections around the mouth of a capsule in mosses and certain fungi.
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’.