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early 15c., diformyte, from Old French deformité "deformity, disfigurement," from Latin deformitatem (nominative deformitas) "ugliness," from deformis "misformed, misshapen," from deformare (see deform).
deformity de·for·mi·ty (dĭ-fôr'mĭ-tē)
The state of being deformed.
A deviation from the normal shape or size of a body part, resulting in disfigurement.