Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having a shell consisting of a single valve or piece. Used of a mollusk.
  • adj. Composed of a single valve or piece. Used of a shell.
  • n. A univalve mollusk or shell.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. having one valve, typically used to refer to mollusks, notably slugs and snails.
  • adj. consisting of a single valve or piece, used to refer to a shell.
  • n. A univalve mollusk or its shell.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having one valve.
  • n. A shell consisting of one valve only; a mollusk whose shell is composed of a single piece, as the snails and conchs.

from The Century Dictionary and Cyclopedia

  • Having one valve only, as a mollusk; not bivalve or multivalve; univalved or univalvular. See II.
  • Having the carapace single, or not hinged in the middle line: specifying the cladocerous or daphniaceous crustaceans. [Now rare.] In botany, consisting of one valve or piece.
  • n. In conchology, a univalve mollusk or its shell; a shell consisting of a single piece; formerly, a member of one of three Linnean divisions of Testacea, as distinguished from bivalves and multivalves.
  • n. body-whorl or aperture are collectively the spire, ending at the tip, point, or apex. The opposite end of the shell is the base, which often presents a depression, the umbilicus; the circumference, a completely lipped aperture, is the peristome. The spiral line between the successive whorls or volutions is the suture. See words italicized above with various cuts there, or there cited.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. used of mollusks, especially gastropods, as snails etc.
  • n. a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes

Etymologies

Originated 1655–65 from uni- (“one”) +‎ valve. (Wiktionary)

Examples

  • "Pâte de Guimauve" owes its healing nutritive character to this despised univalve, which is said to enter largely into its composition.

    Wild Nature Won By Kindness

  • The saltwater univalve with the ear-shaped shell, iridescent inside, contains a rock-clinging creature which, when pounded thin and tender, like a scaloppine, holds pride of place at Chinese banquets.

    Abalone delicious

  • Brined pork at Boulevard With farm-raised local Davenport abalone, the Aqua kitchen played an even subtler contrapuntal game, mimicking the challenging texture of this expensive univalve with other naturally spunky foods rich in distinct flavors of their own: pork belly, chanterelle mushrooms and smoked garlic, combined in a reduced "jus" rendered from Manila clams.

    Bay Watch

  • Vetustovermis bears a number of morphological features that are found in Kimberella, which has been interpreted to have a non-mineralized but stiff univalve shell.

    Down with phyla! (episode II) - The Panda's Thumb

  • The hill consisted of a red ferruguinous sandstone, in parts of which were imbedded univalve and bivalve shells, pieces of water-worn or burnt wood, and what seemed fragments of bone.

    Journal of an Expedition into the Interior of Tropical Australia

  • If strong winds occur during the cool months, among the wreaths of broken seaweed thrown on the beach may be found unbroken and fresh specimens of a singularly beautiful and fragile univalve known commonly and most appropriately as the

    Tropic Days

  • "Besides, " said the pretty univalve, -having frightened away the lovers, it is our fault that you are stranded here.

    Skinny Legs and All

  • Fossil wood with _Teredo antenautæ_ is also met with, and pyritous casts of univalve and bivalve shells.

    Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology

  • Cochleate: spirally twisted like a screw or a univalve shell.

    Explanation of Terms Used in Entomology

  • He sees the wave lines, the effect of waves on soft sand, the delicate shading of the bottom in grays innumerable; now the collar-like egg of a univalve or the sharp eye of a sole or halibut protruding from the sand.

    The California Birthday Book

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