GILL

Definition

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