资料来源 : Webster's Revised Unabridged Dictionary (1913)

Scala \Sca"la\, n.; pl. {Scal[ae]}. [L., a ladder.]
   1. (Surg.) A machine formerly employed for reducing
      dislocations of the humerus.

   2. (Anat.) A term applied to any one of the three canals of
      the cochlea.