| Noun | 1. | fluidounce - a British imperial unit of capacity or volume (liquid or dry) equal to 8 fluid drams or 28.416 cubic centimeters (1.734 cubic inches) British capacity unit, Imperial capacity unit - a unit of measure for capacity officially adopted in the British Imperial System; British units are both dry and wet fluid drachm, fluid dram, fluidram, drachm - a British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimeters gill - a British imperial capacity unit (liquid or dry) equal to 5 fluid ounces or 142.066 cubic centimeters |
| 2. | fluidounce - a United States unit of capacity or volume equal to 1.804 cubic inches United States liquid unit - a liquid unit officially adopted in the United States Customary System fluid drachm, fluid dram, fluidram, drachm - a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce gill - a United States liquid unit equal to 4 fluid ounces |