combination by weight

1 definition found

combination by weight - Collaborative International Dictionary of English v.0.48 :

  Combination \Com`bi*na"tion\, n. [LL. combinatio. See
     Combine.]
     1. The act or process of combining or uniting persons and
        things.
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              Making new compounds by new combinations. --Boyle.
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              A solemn combination shall be made
              Of our dear souls.                    --Shak.
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     2. The result of combining or uniting; union of persons or
        things; esp. a union or alliance of persons or states to
        effect some purpose; -- usually in a bad sense.
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              A combination of the most powerful men in Rome who
              had conspired my ruin.                --Melmoth.
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     3. (Chem.) The act or process of uniting by chemical
        affinity, by which substances unite with each other in
        definite proportions by weight to form distinct compounds.
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     4. pl. (Math.) The different arrangements of a number of
        objects, as letters, into groups.
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     Note: In combinations no regard is paid to the order in which
           the objects are arranged in each group, while in
           variations and permutations this order is respected.
           --Brande & C.
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     Combination car, a railroad car containing two or more
        compartments used for different purposes. [U. S.]
  
     Combination lock, a lock in which the mechanism is
        controlled by means of a movable dial (sometimes by
        several dials or rings) inscribed with letters or other
        characters. The bolt of the lock can not be operated until
        after the dial has been so turned as to combine the
        characters in a certain order or succession.
  
     Combination room, in the University of Cambridge, Eng., a
        room into which the fellows withdraw after dinner, for
        wine, dessert, and conversation.
  
     Combination by volume (Chem.), the act, process, or ratio
        by which gaseous elements and compounds unite in definite
        proportions by volume to form distinct compounds.
  
     Combination by weight (Chem.), the act, process, or ratio,
        in which substances unite in proportions by weight,
        relatively fixed and exact, to form distinct compounds.
        See Law of definite proportions, under Definite.
  
     Syn: Cabal; alliance; association; league; union;
          confederacy; coalition; conspiracy. See Cabal.
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