Definition of scalene in English:
 scalene
adjective ˈskeɪliːnˈskeɪlin
(of a triangle) having sides unequal in length.
 Example sentencesExamples
-  The most interesting results show, with a very ingenious proof, that an equilateral triangle has a greater area than any isosceles or scalene triangle with the same perimeter.
 -  The dialogue elaborates an account of the world wherein the four different basic kinds of matter - earth, air, fire, and water - are regular solids composed from plane figures: isosceles and scalene right-angled triangles.
 
noun ˈskeɪliːnˈskeɪlin
1Anatomy 
another term for scalenus
 Example sentencesExamples
-  However, in both the diaphragm and scalenes, the reduction in firing rate was most apparent in patients with high firing rates before surgery.
 -  Typically the anterior scalene arises from the fourth, fifth and sixth cervical vertebrae (anterior tubercles), occasionally from the third, and rarely from the seventh.
 -  It may perforate the middle and posterior scalene muscles; these two muscles usually form a common mass.
 -  The fifth cervical nerve may pass in front of or through the anterior scalene muscle.
 -  Single motor unit activity in the diaphragm and scalenes was recorded with monopolar electrodes, using methods reported previously.
 
Origin
  
Mid 17th century: via late Latin from Greek skalēnos 'unequal'; related to skolios 'bent'.