scalene

[skey-leen] /skeɪˈlin/
adjective
1.
Geometry.
  1. (of a cone or the like) having the axis inclined to the base.
  2. (of a triangle) having three unequal sides.
2.
Anatomy. of or pertaining to a scalenus muscle.
Origin
1635-45; < Late Latin scalēnus < Greek skalēnós unequal
Examples from the web for scalene
  • Have the words equilateral, isosceles, and scalene written on labels placed on a mat on the floor.
  • Have the participants draw a scalene triangle and copy it several times to make congruent triangles.
British Dictionary definitions for scalene

scalene

/ˈskeɪliːn/
adjective
1.
(maths) (of a triangle) having all sides of unequal length
2.
(anatomy) of or relating to any of the scalenus muscles
Word Origin
C17: from Late Latin scalēnus with unequal sides, from Greek skalēnos
Word Origin and History for scalene
adj.

"having unequal sides," 1680s, from Late Latin scalenus, from Greek skalenos "uneven, unequal, odd (numbered)," as a noun, "triangle with unequal sides," from skallein "chop, hoe," from PIE *(s)kel- (1) "to cut" (see scale (n.1)).

scalene in Science
scalene
  (skā'lēn')   
Having three unequal sides, as a triangle that is neither equilateral nor isosceles.