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cleft lip

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noun
  1. a congenitally deformed lip, usually the upper one, in which there is a vertical fissure that extends into one or both nostrils.
  2. the deformity itself.
See also cleft lip.

Usage note

See harelip.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for cleft lip

cleft lip

noun
  1. a congenital split in the upper lip, often associated with a cleft palate
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

cleft lip in Medicine

cleft lip

n.
  1. A congenital facial deformity of the lip, usually the upper lip, due to a mesodermal deficiency or to a failure of merging in one or more of the embryologic processes that form the lip; it is frequently associated with cleft tooth socket and cleft palate.cheiloschisis harelip
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

cleft lip in Science

cleft lip

[klĕft]
  1. A congenital deformity characterized by a vertical cleft or pair of clefts in the upper lip, with or without involvement of the palate.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

cleft lip in Culture

cleft lip

A congenital defect in which the upper lip is not properly fused together, so that a narrow crack or fissure splits the lip. It can be repaired through plastic surgery.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.