gill

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Related to gill cover: lateral line, pelvic fin, swim bladder
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  • noun

Synonyms for gill

a British imperial capacity unit (liquid or dry) equal to 5 fluid ounces or 142

a United States liquid unit equal to 4 fluid ounces

any of the radiating leaflike spore-producing structures on the underside of the cap of a mushroom or similar fungus

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respiratory organ of aquatic animals that breathe oxygen dissolved in water

References in periodicals archive ?
A vivid black beauty mark with a reddish, crescent border flares out from the trailing edge of its gill cover.
However, the fossils don't include an operculum, or gill cover, that would have protected the delicate structures and moved oxygenated water across them.
Dorsal rays XIII,17 (last divided to base); anal rays III,18 (last divided to base); pectoral rays 16 (upper two and lowermost unbranched); pelvic rays I,5; transverse scale rows from upper end of gill opening to base of caudal fin 43-45; scale rows above lateral line to origin of dorsal fin 9; scale rows below lateral line to origin of anal fin about 20; lateral line in two sections, the anterior part extending from upper edge of gill cover to below level of posteriormost dorsal fin ray containing 37 scales and the posterior part containing 7 scales along middle of caudal peduncle; transverse scale rows on opercle 7; gill rakers on first branchial arch 5 + 12, total rakers 17, the rakers short and stubby, much shorter than gill filaments; vertebrae 10 + 14.
If you gently put your fingers inside a gill cover until you reach the gristly jaw bone where there are no teeth, the pike will open its mouth wide so you can take the hooks out with artery forceps.