fluid ounce
Definition
- Noun:
- A unit of volume in the US Customary System: A fluid ounce is a unit for measuring liquid capacity in the United States, equal to 1/128 of a US gallon, approximately 1.804 cubic inches, or about 29.57 milliliters.
- A unit of volume in the British Imperial System: A fluid ounce is a unit for measuring liquid (and sometimes dry) capacity in the British Imperial system, equal to 1/160 of an imperial gallon, or 28.416 milliliters (approximately 1.734 cubic inches).
Usage Examples
- Noun:
- The recipe calls for two fluid ounces of vanilla extract.
- In the UK, a standard shot is often 25 milliliters, which is slightly less than one imperial fluid ounce.
- The bottle contains 16 fluid ounces of water.
Advanced Usage
- Abbreviation: The term is commonly abbreviated as fl oz or fl. oz. on packaging and in recipes.
- The label reads "Net Contents: 12 fl oz."
- Contextual Distinction: It is crucial to specify the system (US or Imperial) when precision is required, as they are different volumes.
- A US fluid ounce is about 4% larger than an imperial fluid ounce.
Variants and Related Words
- Ounce (oz): A unit of weight (avoirdupois ounce) equal to 1/16 of a pound. It is important not to confuse the fluid ounce (volume) with the ounce (weight).
- Gill: A unit of volume equal to 4 imperial fluid ounces or 5 US fluid ounces.
- Pint: A unit of volume equal to 20 imperial fluid ounces or 16 US fluid ounces.
Synonyms
- Liquid ounce: A less common but descriptive synonym emphasizing it measures liquid volume.
- Volume ounce: A technical term sometimes used to distinguish it from a weight ounce.
Related Phrases
- Fluid dram: A smaller unit of volume; there are 8 fluid drams in an imperial fluid ounce.
- Cubic inch: A unit of volume; the US fluid ounce is defined as 1.804 cubic inches.
Noun
-
a United States unit of capacity or volume equal to 1.804 cubic inches
-
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)
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