Gill

(redirected from gill cover)
Also found in: Dictionary, Thesaurus, Medical, Financial, Encyclopedia, Wikipedia.
Related to gill cover: lateral line, pelvic fin, swim bladder

GILL. A measure of capacity, equal to one-fourth of a pint. Vide Measure.

References in periodicals archive ?
All sizes show blue lines in the gill cover and along the back, with a single black spot near the dorsal fin about three-quarters of the way to the fin.
To breathe, most--but not all--fish pump water through their mouth, over their gills and out their gill cover, called the operculum.
Wearing a glove the fingers should be put inside a gill cover until you reach the gristly jaw bone where there are no teeth.