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Peristome
Meaning
Noun
●
In Botany:
One or two
rings
of tooth-like
appendages
surrounding
the
opening
of the
capsule
of many mosses.
●
In Zoology:
The
parts
of or
surrounding
the
mouths
of
numerous
invertebrates.
●
The
lip
, or
edge
of the
aperture
, of a
spiral
shell.
Sourced from
Wiktionary
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