a measure of capacity equal to 1/16 pint or 1.8047 cubic inches (29.573 milliliters) in the U.S., and equal to 1/20 of an imperial pint, or 1.7339 cubic inches (28.413 milliliters) in Great Britain. Abbr.: fl. oz; Symbol: f oz.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.