\Ter`a*tol"o*gy\, n. [Gr. ?, ?, a wonder, monster + -logy: cf. Gr. ? a telling of wonders, and F. t['e]ratologie.] 1. That branch of biological science which treats of monstrosities, malformations, or deviations from the normal type of structure, either in plants or animals. 2. Affectation of sublimity; bombast. [Obs.] --Bailey.