fluid ounce


a measure of capacity equal to 1/16 (0.0625) pint (29.6 milliliters) in the U.S., and equal to 1/20 (0.05) of an imperial pint (28.4 milliliters) in Great Britain. Abbreviation: fl. oz; Symbol: f

Nearby words

  1. fluid drive,
  2. fluid dynamics,
  3. fluid lubrication,
  4. fluid mechanics,
  5. fluid mosaic model,
  6. fluid pressure,
  7. fluidextract,
  8. fluidics,
  9. fluidity,
  10. fluidize

Origin of fluid ounce

First recorded in 1880–85

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for fluid ounce

fluid ounce


a unit of capacity equal to the volume of one avoirdupois ounce of distilled water at 62°F: there are twenty fluid ounces in an Imperial pint and sixteen in a US pint
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for fluid ounce

fluid ounce


A unit of volume or capacity equal to 8 fluid drams or 29.57 milliliters.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for fluid ounce

fluid ounce

A unit of liquid volume or capacity in the US Customary System equal to 116 of a pint (29.57 milliliters). See Table at measurement.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.