Her`pe*tol"o*gy (?), n. [Written also, but less properly, erpetology.] [Gr. &?; a creeping thing, reptile (fr. &?; to creep) + -logy: cf. F. herpétologie.] The natural history of reptiles; that branch of zoölogy which relates to reptiles, including their structure, classification, and habits.

• the branch of biology dealing with reptiles (Reptilia).