n. An abnormal developmental feature of offspring.
the GNU version of the Collaborative International Dictionary of English
n. Ill formation; irregular or anomalous formation; abnormal or wrong conformation or structure; -- often used of body parts such as limbs which do not develop properly during fetal maturation.
The Century Dictionary and Cyclopedia
n. Faulty formation; irregular or anomalous formation or structure, especially in a living body; a deviation from the normal form or structure either in the whole or in part of an organ. Also, until recently, maleformation.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. something abnormal or anomalous
n. an affliction in which some part of the body is misshapen or malformed
Word Usage
"This malformation is characterized by myelomeningocele and posterior fossa abnormalities, which have distinct sonographic appearances (the so-called “lemon” and “banana” signs)."