malformation
Pronunciation: mal′fōr-mā′shŭn
Definition: Failure of proper or normal development; more specifically, a primary structural defect that results from a localized error of morphogenesis; cleft lip. Most malformations are considered to be a defect of a morphogenetic or developmental field that responds as a coordinated unit to embryonic interaction.
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Examples: glitazone, GI cocktail, etc.
