Gray \Gray\ (gr[=a]), n. [named after Louis Harold Gray, English
   radiobiologist.]
   the SI unit of absorbed dosage of ionizing radiation, equal
   to an absorbed energy of 1 joule per kilogram of irradiated
   material; -- abbreviated Gy. This unit is 100 times the
   commonly used unit, the {rad}.
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Gray \Gray\ (gr[=a]), a. [Compar. {Grayer}; superl. {Grayest}.]
   [OE. gray, grey, AS. gr[=ae]g, gr[=e]g; akin to D. graauw,
   OHG. gr[=a]o, G. grau, Dan. graa, Sw. gr[*a], Icel. gr[=a]r.]
   [Written also {grey}.]
   1. any color of neutral hue between white and black; white
      mixed with black, as the color of pepper and salt, or of
      ashes, or of hair whitened by age; sometimes, a dark mixed
      color; as, the soft gray eye of a dove.
      
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            These gray and dun colors may be also produced by
            mixing whites and blacks.             --Sir I.
                                                  Newton.
      
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   2. Gray-haired; gray-headed; of a gray color; hoary.
      
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   3. Old; mature; as, gray experience. -- Ames.
      
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   4. gloomy; dismal.
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   {Gray antimony} (Min.), stibnite.

   {Gray buck} (Zool.), the chickara.

   {Gray cobalt} (Min.), smaltite.

   {Gray copper} (Min.), tetrahedrite.

   {Gray duck} (Zool.), the gadwall; also applied to the female
      mallard.

   {Gray falcon} (Zool.) the peregrine falcon.

   {Gray Friar}. See {Franciscan}, and {Friar}.

   {Gray hen} (Zool.), the female of the blackcock or black
      grouse. See {Heath grouse}.

   {Gray mill} or {Gray millet} (Bot.), a name of several plants
      of the genus {Lithospermum}; gromwell.

   {Gray mullet} (Zool.) any one of the numerous species of the
      genus {Mugil}, or family {Mugilidae}, found both in the
      Old World and America; as the European species
      ({Mugilidae capito}, and {Mugilidae auratus}), the
      American striped mullet ({Mugilidae albula}), and the
      white or silver mullet ({Mugilidae Braziliensis}). See
      {Mullet}.

   {Gray owl} (Zool.), the European tawny or brown owl ({Syrnium  aluco}). The great gray owl ({Ulula cinerea}) inhabits
      arctic America.

   {Gray parrot} (Zool.), an African parrot ({Psittacus  erithacus}), very commonly domesticated, and noted for its
      aptness in learning to talk. Also called {jako}.

   {Gray pike}. (Zool.) See {Sauger}.

   {Gray snapper} (Zool.), a Florida fish; the sea lawyer. See
      {Snapper}.

   {Gray snipe} (Zool.), the dowitcher in winter plumage.

   {Gray whale} (Zool.), a rather large and swift whale of the
      northern Pacific ({Eschrichtius robustus}, formerly
      {Rhachianectes glaucus}), having short jaws and no dorsal
      fin. It grows to a length of 50 feet (someimes 60 feet).
      It was formerly taken in large numbers in the bays of
      California, and is now rare; -- called also {grayback},
      {devilfish}, and {hardhead}. It lives up to 50 or 60 years
      and adults weigh from 20 to 40 tons.
      
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Gray \Gray\ (gr[=a]), n.
   1. A gray color; any mixture of white and black; also, a
      neutral or whitish tint.
      
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   2. An animal or thing of gray color, as a horse, a badger, or
      a kind of salmon.
      
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            Woe worth the chase, woe worth the day.
            That coats thy life, my gallant gray. --Sir W.
                                                  Scott.
      
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   3. (U. S. History) the Confederate army or a soldier in the
      confederate army; as, a battle between the blue and the
      gray.
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