peristome
noun
the one or two circles of small, pointed, toothlike appendages around the orifice of a capsule or urn of mosses, appearing when the lid is removed.
peristomial
-
a word derived from
peristome.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The mouth lies slightly above the center of the body and marks the posterior limit of the ventral peristomial groove, which curves slightly from the anterior extremity.
From Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 by Gary N. (Gary Nathan) Calkins
It is, however, always possible to recognize a head, which consists at least of the peristomial segment with a forward projection of the same, the prostomium.
From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" by Various
No peristomial torsion; body highly contractile; no undulating membrane Genus Spirostomum Key to the marine genera of Bursaridæ.
From Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 by Gary N. (Gary Nathan) Calkins
The mouth is large and placed at the apex of the peristomial triangle and opens into a comparatively small œsophagus.
From Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 by Gary N. (Gary Nathan) Calkins
Mouth anterior or central; pharynx short or absent; peristomial depression faint or absent Family Chiliferidæ b.
From Marine Protozoa from Woods Hole Bulletin of the United States Fish Commission 21:415-468, 1901 by Gary N. (Gary Nathan) Calkins
