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2 definitions found
 for water of crystallization
From The Collaborative International Dictionary of English v.0.48 :

  Water \Wa"ter\ (w[add]"t[~e]r), n. [AS. w[ae]ter; akin to OS.
     watar, OFries. wetir, weter, LG. & D. water, G. wasser, OHG.
     wazzar, Icel. vatn, Sw. vatten, Dan. vand, Goth. wat[=o], O.
     Slav. & Russ. voda, Gr. 'y`dwr, Skr. udan water, ud to wet,
     and perhaps to L. unda wave. [root]137. Cf. Dropsy,
     Hydra, Otter, Wet, Whisky.]
     1. The fluid which descends from the clouds in rain, and
        which forms rivers, lakes, seas, etc. "We will drink
        water." --Shak. "Powers of fire, air, water, and earth."
        [1913 Webster]
     Note: Pure water consists of hydrogen and oxygen, H2O, and
           is a colorless, odorless, tasteless, transparent
           liquid, which is very slightly compressible. At its
           maximum density, 39[deg] Fahr. or 4[deg] C., it is the
           standard for specific gravities, one cubic centimeter
           weighing one gram. It freezes at 32[deg] Fahr. or
           0[deg] C. and boils at 212[deg] Fahr. or 100[deg] C.
           (see Ice, Steam). It is the most important natural
           solvent, and is frequently impregnated with foreign
           matter which is mostly removed by distillation; hence,
           rain water is nearly pure. It is an important
           ingredient in the tissue of animals and plants, the
           human body containing about two thirds its weight of
           [1913 Webster]
     2. A body of water, standing or flowing; a lake, river, or
        other collection of water.
        [1913 Webster]
              Remembering he had passed over a small water a poor
              scholar when first coming to the university, he
              kneeled.                              --Fuller.
        [1913 Webster]
     3. Any liquid secretion, humor, or the like, resembling
        water; esp., the urine.
        [1913 Webster]
     4. (Pharm.) A solution in water of a gaseous or readily
        volatile substance; as, ammonia water. --U. S. Pharm.
        [1913 Webster]
     5. The limpidity and luster of a precious stone, especially a
        diamond; as, a diamond of the first water, that is,
        perfectly pure and transparent. Hence, of the first water,
        that is, of the first excellence.
        [1913 Webster]
     6. A wavy, lustrous pattern or decoration such as is imparted
        to linen, silk, metals, etc. See Water, v. t., 3,
        Damask, v. t., and Damaskeen.
        [1913 Webster]
     7. An addition to the shares representing the capital of a
        stock company so that the aggregate par value of the
        shares is increased while their value for investment is
        diminished, or "diluted." [Brokers' Cant]
        [1913 Webster]
     Note: Water is often used adjectively and in the formation of
           many self-explaining compounds; as, water drainage;
           water gauge, or water-gauge; waterfowl, water-fowl, or
           water fowl; water-beaten; water-borne, water-circled,
           water-girdled, water-rocked, etc.
           [1913 Webster]
     Hard water. See under Hard.
     Inch of water, a unit of measure of quantity of water,
        being the quantity which will flow through an orifice one
        inch square, or a circular orifice one inch in diameter,
        in a vertical surface, under a stated constant head; also
        called miner's inch, and water inch. The shape of the
        orifice and the head vary in different localities. In the
        Western United States, for hydraulic mining, the standard
        aperture is square and the head from 4 to 9 inches above
        its center. In Europe, for experimental hydraulics, the
        orifice is usually round and the head from 1/2 of an inch
        to 1 inch above its top.
     Mineral water, waters which are so impregnated with foreign
        ingredients, such as gaseous, sulphureous, and saline
        substances, as to give them medicinal properties, or a
        particular flavor or temperature.
     Soft water, water not impregnated with lime or mineral
     To hold water. See under Hold, v. t.
     To keep one's head above water, to keep afloat; fig., to
        avoid failure or sinking in the struggles of life.
     To make water.
        (a) To pass urine. --Swift.
        (b) (Naut.) To admit water; to leak.
     Water of crystallization (Chem.), the water combined with
        many salts in their crystalline form. This water is
        loosely, but, nevertheless, chemically, combined, for it
        is held in fixed and definite amount for each substance
        containing it. Thus, while pure copper sulphate, CuSO4,
        is a white amorphous substance, blue vitriol, the
        crystallized form, CuSO4.5H2O, contains five molecules
        of water of crystallization.
     Water on the brain (Med.), hydrocephalus.
     Water on the chest (Med.), hydrothorax.
        [1913 Webster]
     Note: Other phrases, in which water occurs as the first
           element, will be found in alphabetical order in the
           [1913 Webster]

From WordNet (r) 3.0 (2006) :

  water of crystallization
      n 1: the water present in hydrated compounds [syn: water of
           crystallization, water of crystallisation, water of

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