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peristome

Upper-Intermediate (B2)

IPA: /ˈpɛrɪˌstoʊm/

KK: /pɛrɪˈstoʊm/

noun
Definition

A ring of tooth-like structures that surrounds the opening of a moss capsule or the area around the mouth of some invertebrates.


Example

The peristome of the moss capsule helps in the dispersal of spores.


Conversation
Sloth A
Have you ever noticed the peristome on those mosses we saw in the park?
Sloth B
Yeah, it's interesting how they have that fringe around them.
Sloth A
I read that it's important for their reproduction.
Sloth B
That makes sense! Nature has such cool adaptations.

Synonyms & Antonyms
Synonyms
fringe
appendage
border
Antonyms
center
core
interior
Root Explanation

Peristome → It is formed from "peri-" (meaning around) and "stoma" (from Greek, meaning mouth or opening). The word refers to a structure that surrounds an opening or mouth, particularly in botanical contexts.

Memory Tip

Think of something that is 'around' ('peri-') an 'opening' ('stoma') — that's why peristome refers to a structure surrounding an opening.

Visually Confused Words
epistome
eerisome
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