Definition of opisthobranch
opisthobranchs
: any of a subclass (Opisthobranchia) of marine gastropod mollusks that have the gills when present posterior to the heart and often lack a shell
opisthobranch
adjectiveFrom the M-W Editors
Origin and Etymology of opisthobranch
New Latin Opisthobranchia, from Greek opisthen behind (akin to Greek epi on) + branchia gills — more at epi-
Learn More about opisthobranch
-
Britannica.com: Encyclopedia article about opisthobranch
Seen and Heard
What made you want to look up opisthobranch? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!