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3 definitions found
 for Fluid ounce
From The Collaborative International Dictionary of English v.0.48 :

  Fluid \Flu"id\, n.
     A fluid substance; a body whose particles move easily among
     [1913 Webster]
     Note: Fluid is a generic term, including liquids and gases as
           species. Water, air, and steam are fluids. By analogy,
           the term was sometimes applied to electricity and
           magnetism, as in phrases electric fluid, magnetic
           fluid, though not strictly appropriate; such usage has
           [1913 Webster +PJC]
     Fluid dram, or Fluid drachm, a measure of capacity equal
        to one eighth of a fluid ounce.
     Fluid ounce.
     (a) In the United States, a measure of capacity, in
         apothecaries' or wine measure, equal to one sixteenth of
         a pint or 29.57 cubic centimeters. This, for water, is
         about 1.04158 ounces avoirdupois, or 455.6 grains.
     (b) In England, a measure of capacity equal to the twentieth
         part of an imperial pint. For water, this is the weight
         of the avoirdupois ounce, or 437.5 grains.
     Fluids of the body. (Physiol.) The circulating blood and
        lymph, the chyle, the gastric, pancreatic, and intestinal
        juices, the saliva, bile, urine, aqueous humor, and muscle
        serum are the more important fluids of the body. The
        tissues themselves contain a large amount of combined
        water, so much, that an entire human body dried in vacuo
        with a very moderate degree of heat gives about 66 per
        cent of water.
     Burning fluid, Elastic fluid, Electric fluid, Magnetic
     fluid, etc. See under Burning, Elastic, etc.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Ounce \Ounce\ (ouns), n. [F. once, fr. L. uncia a twelfth, the
     twelfth part of a pound or of a foot: cf. Gr. 'o`gkos bulk,
     mass, atom. Cf. 2d Inch, Oke.]
     1. A unit of mass or weight, the sixteenth part of a pound
        avoirdupois, and containing 28.35 grams or 4371/2 grains.
        [1913 Webster +PJC]
     2. (Troy Weight) The twelfth part of a troy pound; one troy
        ounce weighs 31.103486 grams, 8 drams, or 480 grains.
        [1913 Webster +PJC]
     Note: The troy ounce contains twenty pennyweights, each of
           twenty-four grains, or, in all, 480 grains, and is the
           twelfth part of the troy pound. The troy ounce is also
           a weight in apothecaries' weight. [Troy ounce is
           sometimes written as one word, troyounce.]
           [1913 Webster]
     3. Fig.: A small portion; a bit. [Obs.]
        [1913 Webster]
              By ounces hung his locks that he had. --Chaucer.
        [1913 Webster]
     Fluid ounce. See under Fluid, n.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  fluid ounce
      n 1: 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) [syn: fluidounce, fluid ounce]
      2: a United States unit of capacity or volume equal to 1.804
         cubic inches [syn: fluidounce, fluid ounce]

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