Quiz: Remember the definition of mal de mer?


[mal-fawr-mey-shuh n, -fer-] /ˌmæl fɔrˈmeɪ ʃən, -fər-/
faulty or anomalous formation or structure, especially in a living body:
malformation of the teeth.
1790-1800; mal- + formation Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for malformation
  • 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.
British Dictionary definitions for malformation


the condition of being faulty or abnormal in form or shape
(pathol) a deformity in the shape or structure of a part, esp when congenital
Derived Forms
malformed, adjective
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
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Word Origin and History for malformation

also mal-formation, 1731, from mal- + formation.

Online Etymology Dictionary, © 2010 Douglas Harper
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malformation in Medicine

malformation mal·for·ma·tion (māl'fôr-mā'shən)
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 Article for 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
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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