Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Measurementfluid ounceˌfluid ˈounce noun [countable] (written abbreviation fl oz) TMa unit for measuring liquid, equal to 1/20 pint or 0.028 litres in Britain, and 1/16 pint or 0.030 litres in the US ldoceonline.com
