cleft lip

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.

See harelip.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To cleft lip
Collins
World English Dictionary
cleft lip
 
n
a congenital split in the upper lip, often associated with a cleft palate

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
Medical Dictionary

cleft lip n.
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. Also called cheiloschisis, harelip.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
cleft lip   (klěft)  Pronunciation Key 
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 © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
American Heritage
Cultural Dictionary

cleft lip definition


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 American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Encyclopedia Britannica
Encyclopedia

cleft lip

relatively common (one out of every 1,000 births) congenital deformity in which the central to medial lip fails to fuse properly during the first month of prenatal life, resulting in a fissure in the lip beneath the nostril. Once colloquially known as harelip, cleft lip may be unilateral or bilateral, it may take the form of anything from a small pit to a complete fissure the height of the lip, and it may occur alone or in conjunction with cleft palate (a fissure in the roof of the mouth). The deformity is sometimes familial; animal experiments suggest it may also occur following some abnormality of intrauterine environment. It is a frequent finding in certain chromosomal disorders. Surgery to repair the defect is performed in the first two months of life and is usually successful.

Learn more about cleft lip with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Example sentences
Cleft lip and cleft palate are caused by a genetic defect during the fourth to eighth week of pregnancy.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature