| respiratory organ of aquatic animals that breathe oxygen dissolved in water | a United States liquid unit equal to 16 fluid ounces; two pints equal one quart |
| any of the radiating leaflike spore-producing structures on the underside of the cap of a mushroom or similar fungus | a British imperial capacity measure (liquid or dry) equal to 4 gills or 568.26 cubic centimeters |
| a United States liquid unit equal to 4 fluid ounces | a United States dry unit equal to 0.5 quart or 33.6 cubic inches |
| a British imperial capacity unit (liquid or dry) equal to 5 fluid ounces or 142.066 cubic centimeters | |