- An order of Amphibia, having an extended, annulated, snakelike human body. See ophiomorpha.
- among major divisions of Amphibia, having a serpentiform human body, no limbs, the end obsolete in the adult, the anal area terminal, and various moment dermal scutes into the integument of the body. The division includes only the family members Cæciliidæ, while the term is a synonym of Ophiomorpha.
- an order of amphibians including caecilians