The pseudobranch, also pseudobranchia is the reduced first gill arch of a fish (on the inner surface of the opercle, near the junction of the preopercle) as well as a reduced `false` gill in some gastropods. In teleost fish, the pseudobranchs are mostly without respiratory function, and in elasmobranchs they are the gill arch of the spiracle. Th.....
• (n.) Same as Pseudobranchia.
Pseu'do·branch noun (Anat.) Same as Pseudobranchia .