Source : Webster's Revised Unabridged Dictionary (1913)

Scalene \Sca*lene"\, a. [L. scalenus, Gr. ?: cf. F. scal[`e]ne.]
   1. (Geom.)
      (a) Having the sides and angles unequal; -- said of a
          triangle.
      (b) Having the axis inclined to the base, as a cone.

   2. (Anat.)
      (a) Designating several triangular muscles called scalene
          muscles.
      (b) Of or pertaining to the scalene muscles.

   {Scalene muscles} (Anat.), a group of muscles, usually three
      on each side in man, extending from the cervical
      vertebr[ae] to the first and second ribs.

Scalene \Sca*lene"\, n. (Geom.)
   A triangle having its sides and angles unequal.

Source : WordNet®

scalene
     adj 1: of a triangle having three sides of different lengths
     2: of or relating to any of the scalene muscles