• (a.) Of or pertaining to teratology; as, teratological changes.
Pertaining to teratology. ... (18 Nov 1997) ... 
Ter`a·to·log'ic·al adjective (Biol.) Of or pertaining to teratology; as, teratological changes. 
teratology, teratological 1. In medicine, the study of birth defects and their causes. 2. 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. The study of monstrosities o...