Gill - Definition
gill
n 1: a British imperial capacity unit (liquid or dry) equal to 5
fluid ounces or 142.066 cubic centimeters
2: a United States liquid unit equal to 4 fluid ounces
3: any of the radiating leaflike spore-producing structures on
the underside of the cap of a mushroom or similar fungus
[syn: gill, lamella]
4: respiratory organ of aquatic animals that breathe oxygen
dissolved in water [syn: gill, branchia]