adj. Of abnormal growth or structure of a fetus or embryo.
the GNU version of the Collaborative International Dictionary of English
adj. Of or pertaining to teratology.
The Century Dictionary and Cyclopedia
Of or pertaining to teratology.
Word Usage
"But then all sorts of seemingly sudden variations are occasionally designated by the same term by one writer or another, and even accidental anomalies, such as teratological ascidia, are often said to arise by sports."