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2 definitions found
 for Compound crystal
From The Collaborative International Dictionary of English v.0.48 :

  Compound \Com"pound\, a. [OE. compouned, p. p. of compounen. See
     Compound, v. t.]
     Composed of two or more elements, ingredients, parts;
     produced by the union of several ingredients, parts, or
     things; composite; as, a compound word.
     [1913 Webster]
           Compound substances are made up of two or more simple
           substances.                              --I. Watts.
     [1913 Webster]
     Compound addition, subtraction, multiplication,
     division (Arith.), the addition, subtraction, etc., of
        compound numbers.
     Compound crystal (Crystallog.), a twin crystal, or one
        seeming to be made up of two or more crystals combined
        according to regular laws of composition.
     Compound engine (Mech.), a form of steam engine in which
        the steam that has been used in a high-pressure cylinder
        is made to do further service in a larger low-pressure
        cylinder, sometimes in several larger cylinders,
     Compound ether. (Chem.) See under Ether.
     Compound flower (Bot.), a flower head resembling a single
        flower, but really composed of several florets inclosed in
        a common calyxlike involucre, as the sunflower or
     Compound fraction. (Math.) See Fraction.
     Compound fracture. See Fracture.
     Compound householder, a householder who compounds or
        arranges with his landlord that his rates shall be
        included in his rents. [Eng.]
     Compound interest. See Interest.
     Compound larceny. (Law) See Larceny.
     Compound leaf (Bot.), a leaf having two or more separate
        blades or leaflets on a common leafstalk.
     Compound microscope. See Microscope.
     Compound motion. See Motion.
     Compound number (Math.), one constructed according to a
        varying scale of denomination; as, 3 cwt., 1 qr., 5 lb.;
        -- called also denominate number.
     Compound pier (Arch.), a clustered column.
     Compound quantity (Alg.), a quantity composed of two or
        more simple quantities or terms, connected by the sign +
        (plus) or - (minus). Thus, a + b - c, and bb - b, are
        compound quantities.
     Compound radical. (Chem.) See Radical.
     Compound ratio (Math.), the product of two or more ratios;
        thus ab:cd is a ratio compounded of the simple ratios a:c
        and b:d.
     Compound rest (Mech.), the tool carriage of an engine
     Compound screw (Mech.), a screw having on the same axis two
        or more screws with different pitch (a differential
        screw), or running in different directions (a right and
        left screw).
     Compound time (Mus.), that in which two or more simple
        measures are combined in one; as, 6-8 time is the joining
        of two measures of 3-8 time.
     Compound word, a word composed of two or more words;
        specifically, two or more words joined together by a
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Crystal \Crys"tal\ (kr[i^]s"tal), n. [OE. cristal, F. cristal,
     L. crystallum crystal, ice, fr. Gr. kry`stallos, fr. kry`os
     icy cold, frost; cf. AS. crystalla, fr. L. crystallum; prob.
     akin to E. crust. See Crust, Raw.]
     1. (Chem. & Min.) The regular form which a substance tends to
        assume in solidifying, through the inherent power of
        cohesive attraction. It is bounded by plane surfaces,
        symmetrically arranged, and each species of crystal has
        fixed axial ratios. See Crystallization.
        [1913 Webster]
     2. The material of quartz, in crystallization transparent or
        nearly so, and either colorless or slightly tinged with
        gray, or the like; -- called also rock crystal.
        Ornamental vessels are made of it. Cf. Smoky quartz,
        Pebble; also Brazilian pebble, under Brazilian.
        [1913 Webster]
     3. A species of glass, more perfect in its composition and
        manufacture than common glass, and often cut into
        ornamental forms. See Flint glass.
        [1913 Webster]
     4. The glass over the dial of a watch case.
        [1913 Webster]
     5. Anything resembling crystal, as clear water, etc.
        [1913 Webster]
              The blue crystal of the seas.         --Byron.
        [1913 Webster]
     Blood crystal. See under Blood.
     Compound crystal. See under Compound.
     Iceland crystal, a transparent variety of calcite, or
        crystallized calcium carbonate, brought from Iceland, and
        used in certain optical instruments, as the polariscope.
     Rock crystal, or Mountain crystal, any transparent
        crystal of quartz, particularly of limpid or colorless
        [1913 Webster]

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