opisthobranch

[ uh-pis-thuh-brangk ]

/ əˈpɪs θəˌbræŋk /

noun

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.

adjective

of or relating to the opisthobranches.

Nearby words

opioid epidemic, opiomelanocortin, opisthenar, opisthion, opistho-, opisthobranch, opisthodomos, opisthognathous, opisthograph, opisthorchiasis, opisthorchis

Also o·pis·tho·bran·chi·ate

[uh-pis-thuh-brang-kee-it, -eyt] /əˌpɪs θəˈbræŋ ki ɪt, -ˌeɪt/.

Origin of opisthobranch

1850–55; < New Latin Opisthobranchia the subclass; see opistho-, branchia

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for opisthobranch

C, Diblastula of an Opisthobranch (Polycera) with elongated blastopore oi.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5|Various

British Dictionary definitions for opisthobranch

opisthobranch

/ (əˈpɪsθəˌbræŋk) /

noun

any marine gastropod of the class Opisthobranchia (or Opisthobranchiata), in which the shell is reduced or absent: includes the pteropods, sea hares, and nudibranchs

Word Origin for opisthobranch

via New Latin from Greek opisthen behind + -branch

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012