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2 definitions found
 for Pearl gray
From The Collaborative International Dictionary of English v.0.48 :

  Pearl \Pearl\, n. [OE. perle, F. perle, LL. perla, perula,
     probably fr. (assumed) L. pirulo, dim. of L. pirum a pear.
     See Pear, and cf. Purl to mantle.]
     1. (Zool.) A shelly concretion, usually rounded, and having a
        brilliant luster, with varying tints, found in the mantle,
        or between the mantle and shell, of certain bivalve
        mollusks, especially in the pearl oysters and river
        mussels, and sometimes in certain univalves. It is usually
        due to a secretion of shelly substance around some
        irritating foreign particle. Its substance is the same as
        nacre, or mother-of-pearl.
     Note: Pearls which are round, or nearly round, and of fine
           luster, are highly esteemed as jewels, and at one time
           compared in value with the precious stones. Since
           development of cultured pearls, the relative value has
           diminished somewhat, though the best pearls are still
           expensive, and natural pearls even more so. Artificial
           pearls may be made of various materials, including
           material similar to that of natural pearls; these are
           less expensive than natural or cultured pearls. See
           cultured pearl, below.
           [1913 Webster +PJC]
     2. Hence, figuratively, something resembling a pearl;
        something very precious.
        [1913 Webster]
              I see thee compassed with thy kingdom's pearl.
        [1913 Webster]
              And those pearls of dew she wears.    --Milton.
        [1913 Webster]
     3. Nacre, or mother-of-pearl.
        [1913 Webster]
     4. (Zool.) A fish allied to the turbot; the brill.
        [1913 Webster]
     5. (Zool.) A light-colored tern.
        [1913 Webster]
     6. (Zool.) One of the circle of tubercles which form the bur
        on a deer's antler.
        [1913 Webster]
     7. A whitish speck or film on the eye. [Obs.] --Milton.
        [1913 Webster]
     8. A capsule of gelatin or similar substance containing some
        liquid for medicinal application, as ether.
        [1913 Webster]
     9. (Print.) A size of type, between agate and diamond.
        [1913 Webster]
     Ground pearl. (Zool.) See under Ground.
     Pearl barley, kernels of barley, ground so as to form
        small, round grains.
     Pearl diver, one who dives for pearl oysters.
     Pearl edge, an edge of small loops on the side of some
        kinds of ribbon; also, a narrow kind of thread edging to
        be sewed on lace.
     Pearl eye, cataract. [R.]
     Pearl gray, a very pale and delicate blue-gray color.
     Pearl+millet,+Egyptian+millet+({Penicillaria+spicata">Pearl millet, Egyptian millet ({Penicillaria spicata).
     Pearl moss. See Carrageen.
     Pearl moth (Zool.), any moth of the genus Margaritia; --
        so called on account of its pearly color.
     Pearl oyster (Zool.), any one of several species of large
        tropical marine bivalve mollusks of the genus
        Meleagrina, or Margaritifera, found in the East Indies
        (especially at Ceylon), in the Persian Gulf, on the coast
        of Australia, and on the Pacific coast of America. Called
        also pearl shell, and pearl mussel.
     Pearl powder. See Pearl white, below.
     Pearl sago, sago in the form of small pearly grains.
     Pearl sinter (Min.), fiorite.
     Pearl spar (Min.), a crystallized variety of dolomite,
        having a pearly luster.
     Pearl white.
        (a) Basic bismuth nitrate, or bismuth subchloride; -- used
            chiefly as a cosmetic.
        (b) A variety of white lead blued with indigo or Berlin
     cultured pearl, a pearl grown by a pearl oyster into which
        a round pellet has been placed, to serve as the seed for
        more predictable growth of the pearl. The pellet is
        usually made from mother-of-pearl, and additional layers
        of nacre are deposited onto the seed by the oyster. Such
        pearls, being more easily obtained than natural pearls
        from wild oysters, are less expensive.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  pearl gray
      adj 1: of a grey with a pearly tinge [syn: pearl grey, pearl

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