1. In medicine, a reference to the study of birth defects and their causes.
2. Referring to that division of embryology and pathology that deals with abnormal development and congenital bodily malformations.
3. Used in biology to denote the study and science of malformations and abnormal growths in animals and plants.
4. Descriptive of the study of monstrosities or abnormal formations in animals or plants; involving monstrosity, monstrous.