peristomial

peristome

[per-uh-stohm]
noun
1.
Botany. 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.
2.
Zoology. any of various structures or sets of parts that surround or form the walls of a mouth or mouthlike opening.

Origin:
1790–1800; < Neo-Latin peristoma. See peri-, -stome

peristomal, peristomatic [per-uh-stuh-mat-ik] , peristomial, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To peristomial
Collins
World English Dictionary
peristome (ˈpɛrɪˌstəʊm)
 
n
1.  a fringe of pointed teeth surrounding the opening of a moss capsule
2.  any of various parts surrounding the mouth of invertebrates, such as echinoderms and earthworms, and of protozoans
 
[C18: from New Latin peristoma, from peri- + Greek stoma mouth]
 
peri'stomal
 
adj
 
peri'stomial
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Science Dictionary
peristome   (pěr'ĭ-stōm')  Pronunciation Key 
  1. A fringe of toothlike appendages surrounding the mouth of the spore capsule of some mosses. The teeth unfold under damp conditions and curl up under dry conditions to disperse spores gradually.

  2. The area or parts around the mouth in certain invertebrates, such as the echinoderms.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Related Words
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;