pseudobranch
Noun
Meaning
Same as Pseudobranchia.
Source: Webster's dictionaryExamples
Though all but the most primitive bony fish lack spiracles, the pseudobranch associated with them often remains, being located at the base of the operculum.
The pseudobranch is small and concealed.
This bears a small pseudobranch that resembles a gill in structure, but only receives blood already oxygenated by the true gills.