malformation

[mal-fawr-mey-shuhn, -fer-]
noun
faulty or anomalous formation or structure, especially in a living body: malformation of the teeth.

Origin:
1790–1800; mal- + formation

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
malformation (ˌmælfɔːˈmeɪʃən)
 
n
1.  the condition of being faulty or abnormal in form or shape
2.  pathol a deformity in the shape or structure of a part, esp when congenital
 
mal'formed
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

malformation
1800, from mal- + formation.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

malformation mal·for·ma·tion (māl'fôr-mā'shən)
n.
Abnormal or anomalous formation or structure; deformity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

malformation

in biology, irregular or abnormal structural development. Malformations occur in both plants and animals and have a number of causes.

Learn more about malformation with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
In connection with the bones of the face a common malformation is cleft palate.
Among grandsons, the only ones to have the malformation were the sons of daughters who were exposed to the drug prenatally.
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