peristome

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per·i·stome

(per'i-stōm),
A groove leading from the cytostome in ciliates and certain other forms of protozoa.
Synonym(s): peristoma
[peri- + G. stoma, mouth]

peristome

(pĕr′ĭ-stōm′)
n.
1. Botany A fringe of toothlike appendages surrounding the mouth of a moss capsule.
2. Zoology The area or parts around the mouth in certain invertebrates.

per′i·sto′mal (-stō′məl), per′i·sto′mi·al (-stō′mē-əl) adj.

peristome

(pĕr′ĭ-stōm) [″ + stoma, mouth]
The channel leading to the cytosome or mouth in certain types of protozoa.

peristome

any structure that occurs around the mouth or opening of an organ.
References in periodicals archive ?
Dry weight of Aristotle's lantern (or test with spines and peristomial membrane (g)) - Dry weight of individual (g) X 100 (7)
Dry weight of Aristotle's lantern (g)/Dry weight of test with spines and peristomial membrane (g) x 100 (8)
The usual method for determining the success of metamorphosis is based on sampling the settlement surfaces 1-3 days after induction, to witness the loss of velum or the secretion of peristomial shell (attachment is not a valid criteria).
This assumption is based on the similarities in anatomy of peristomial palps and virtually identical trace morphologies (see Rodrigues et al.
5 M KCI was injected into the coelomic cavity via the peristomial membrane.