triple time
    n 1: musical time with three beats in each bar

Triple \Tri"ple\, a. [L. triplus; tri- (see Tri-) + -plus, as
   in duplus double: cf. F. triple. See Double, and cf.
   Treble.]
   1. Consisting of three united; multiplied by three;
      threefold; as, a triple knot; a triple tie.
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            By thy triple shape as thou art seen. --Dryden.
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   2. Three times repeated; treble. See Treble.
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   3. One of three; third. [Obs.] --Shak.
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   Triple crown, the crown, or tiara, of the pope. See
      Tiara, 2.

   Triple-expansion steam engine, a compound steam engine in
      which the same steam performs work in three cylinders
      successively.

   Triple measure (Mus.), a measure of tree beats of which
      first only is accented.

   Triple ratio (Math.), a ratio which is equal to 3.

   Triple salt (Chem.), a salt containing three distinct basic
      atoms as radicals; thus, microcosmic salt is a triple
      salt.

   Triple star (Astron.), a system of three stars in close
      proximity.

   Triple time (Mus.), that time in which each measure is
      divided into three equal parts.

   Triple valve, in an automatic air brake for railroad cars,
      the valve under each car, by means of which the brake is
      controlled by a change of pressure in the air pipe leading
      from the locomotive.
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