Definition: A measure of capacity: 1/8 of a fluidounce; a teaspoonful. The imperial fluidrachm contains 54.8 grains of distilled water, and equals 3.55 mL; the U.S. fluidrachm contains 57.1 grains of distilled water and equals 3.70 mL.
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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.