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univalve

[yoo-nuh-valv] /ˈyu nəˌvælv/
adjective, Also, univalved, univalvular
[yoo-nuh-val-vyuh-ler] /ˌyu nəˈvæl vyə lər/ (Show IPA)
1.
having one valve.
2.
(of a shell) composed of a single valve or piece.
noun
3.
a univalve mollusk or its shell.
Origin of univalve
1655-1665
First recorded in 1655-65; uni- + valve
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for univalves
Historical Examples
  • The first two include univalves and Bivalves, the last only univalves.

    Our British Snails John William Horsley
  • Yet, since each of these three univalves has been this day created, these inferences are deceptive.

    Omphalos Philip Henry Gosse
  • The former are univalves and the latter bivalves having two shells for protection.

    Our British Snails John William Horsley
  • Care should be taken not to injure the edge or lip of the mouth of univalves, or the ligament of the hinge of bivalves.

    Our British Snails John William Horsley
  • Beads made from the columell of univalves have generally a number of distinguishing characteristics.

  • We believed the univalves had been chiefly described by him; one, or probably two of the species were not contained in his memoir.

  • The univalves which possess a siphon are, for the most part, carnivorous, and are often most voracious creatures.

    The Sea-beach at Ebb-tide Augusta Foote Arnold
  • A few of the univalves are viviparous—that is, they produce their young alive; but the majority lay eggs.

    The Sea Shore William S. Furneaux
  • Most species of univalves are wanderers, many bivalves are free, and multivalves become fixed at an early stage of existence.

    Tropic Days E. J. Banfield
  • Hermit Crabs take possession of the deserted shells of the univalves, and crawl in pursuit of garbage along the moist beach.

British Dictionary definitions for univalves

univalve

/ˈjuːnɪˌvælv/
adjective
1.
relating to, designating, or possessing a mollusc shell that consists of a single piece (valve)
noun
2.
a gastropod mollusc or its shell
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for univalves

univalve

1660s (noun and adjective), from uni- + valve.

Online Etymology Dictionary, © 2010 Douglas Harper
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univalves in Science
univalve
  (y'nĭ-vālv')   
A gastropod, especially one with a single shell, such as a snail, cone, whelk, abalone, or limpet. Univalves belong to the subclass Prosobranchia. Their shells are usually spiral and can hold the whole animal inside. Compare bivalve.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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