1. a respiratory organ of fish and other aquatic animals that extracts oxygen from water
2. a unit of liquid measure equal to one-fourth of a pint
Usage: archaic
3. the thin plates on the underside of a mushroom cap
Usage: botany

Examples

• The fish breathed through its gills underwater.
• Sharks have multiple gill slits on each side of their head.
• The recipe called for a gill of cream.
• The mushroom’s gills were dark brown and closely spaced.
• Water flows over the gills to extract oxygen.
• The old cookbook measured liquids in gills and pints.