Source : Webster's Revised Unabridged Dictionary (1913)

   7. (Geol.) A small dislocation in beds of rock along a line
      of fissure. --Dana.

   8. (Mus.)
      (a) A grace consisting of two or more small notes moving
          by conjoint degrees, and leading to a principal note
          either above or below.
      (b) An apparatus in the trumpet and trombone by which the
          sounding tube is lengthened and shortened so as to
          produce the tones between the fundamental and its
          harmonics.

   9. (Phonetics) A sound which, by a gradual change in the
      position of the vocal organs, passes imperceptibly into
      another sound.

   10. (Steam Engine)
       (a) Same as {Guide bar}, under {Guide}.
       (b) A slide valve.

   {Slide box} (Steam Engine), a steam chest. See under {Steam}.
      

   {Slide lathe}, an engine lathe. See under {Lathe}.

   {Slide rail}, a transfer table. See under {Transfer}.

   {Slide rest} (Turning lathes), a contrivance for holding,
      moving, and guiding, the cutting tool, made to slide on
      ways or guides by screws or otherwise, and having compound
      motion.

   {Slide rule}, a mathematical instrument consisting of two
      parts, one of which slides upon the other, for the
      mechanical performance of addition and subtraction, and,
      by means of logarithmic scales, of multiplication and
      division.

   {Slide valve}.
       (a) Any valve which opens and closes a passageway by
           sliding over a port.
       (b) A particular kind of sliding valve, often used in
           steam engines for admitting steam to the piston and
           releasing it, alternately, having a cuplike cavity in
           its face, through which the exhaust steam passes. It
           is situated in the steam chest, and moved by the
           valve gear. It is sometimes called a {D valve}, -- a
           name which is also applied to a semicylindrical pipe
           used as a sliding valve.

D valve \D" valve`\ (Mech.)
   A kind of slide valve. See {Slide valve}, under {Slide}.