fluid ounce

definition: a United States unit of capacity or volume equal to 1.804 cubic inches
example:
speech part: noun
synonyms: fluidounce
definition: 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)
example:
speech part: noun
synonyms: fluidounce

How fluid ounce is being used?