[uh-pis-thuh-brangk] /əˈpɪs θəˌbræŋk/
any gastropod mollusk of the order Opisthobranchia, as the sea slugs, sea butterflies, and sea hares, characterized by a vestigial or absent mantle and shell and two pairs of tentacles.
of or relating to the opisthobranches.
any marine gastropod of the class Opisthobranchia (or Opisthobranchiata), in which the shell is reduced or absent: includes the pteropods, sea hares, and nudibranchs
[op-is-thod-uh-muh s, -mos] /ˌɒp ɪsˈθɒd ə məs, -ˌmɒs/ noun, plural opisthodomoses. 1. Also called posticum. a small room in the cella of a classical temple, as for a treasury. 2. .
[op-is-thog-nuh-thuh s] /ˌɒp ɪsˈθɒg nə θəs/ adjective, Zoology. 1. having receding jaws. /ˌɒpɪsˈθɒɡnəθəs/ adjective 1. (of a person or animal) having receding jaws
[uh-pis-thuh-graf, -grahf] /əˈpɪs θəˌgræf, -ˌgrɑf/ noun 1. a manuscript, parchment, or book having writing on both sides of the leaves.
opisthorchiasis op·is·thor·chi·a·sis (ŏp’ĭs-thôr-kī’ə-sĭs, ō-pĭs’thôr-) n. Infection of the biliary tract with trematodes of the genus Opisthorchis, caused by ingesting raw or inadequately cooked fish infected with the parasites.