• synonyms


[bahy-kon-keyv, bahy-kon-keyv]
See more synonyms for biconcave on Thesaurus.com
  1. concave on both sides, as a lens.
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Origin of biconcave

First recorded in 1825–35; bi-1 + concave
Related formsbi·con·cav·i·ty [bahy-kuh n-kav-i-tee] /ˌbaɪ kənˈkæv ɪ ti/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

dipped, hollow, round, rounded, sinking, sunken, biconcave, cupped, dented, dimpled, excavated, hollowed, incurvate, sagging

Examples from the Web for biconcave

Historical Examples

  • The vertebrae are solid and may be opisthocoelous, biconcave, or flat.

    The Vertebrate Skeleton

    Sidney H. Reynolds

  • The vertebræ of its backbone are not biconcave, but flat in front and behind.

  • Owing to the beaded structure of the notochord the vertebral bodies take of necessity a biconcave hourglass-shaped form.

  • The end result is an amphicoelous or biconcave centrum in general appearance much like that of the Selachian.

  • The human blood-corpuscle is a non-nucleated, biconcave disc, having a diameter of about 1/3500 of an inch.

British Dictionary definitions for biconcave


  1. (of a lens) having concave faces on both sides; concavo-concave
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Derived Formsbiconcavity (ˌbaɪkɒnˈkævɪtɪ), noun
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

biconcave in Medicine


(bī′kŏn-kāv, bī-kŏnkāv′)
  1. Concave on both sides or surfaces.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

biconcave in Science


  1. Concave on both sides or surfaces.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.