scalene

[ skey-leen ]

/ skeɪˈlin /

Geometry.

Anatomy. of or relating to a scalenus muscle.

Origin of scalene

1635–45; < Late Latin scalēnus < Greek skalēnós unequal

The general form is bounded by twelve scalene triangles and is a ditrigonal bipyramid.

Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 |Various
Of triangles there are two kinds; one having the opposite sides equal (isosceles), the other with unequal sides (scalene).

Timaeus |Plato
A scalene or scaly member has no one side which is equal to his own interest.

Punch, or the London Charivari, Vol. 1, October 9, 1841 |Various
The dramatis persona in their relative positions first formed an isosceles triangle, then a scalene, afterwards a right line.

The Ocean Waifs |Mayne Reid

But it is sometime rationall, and to be expressed by a number: yet but in a scalene triangle onely.

The Way To Geometry |Peter Ramus

scalene

/ (ˈskeɪliːn) /

maths (of a triangle) having all sides of unequal length

anatomy of or relating to any of the scalenus muscles

C17: from Late Latin scalēnus with unequal sides, from Greek skalēnos

scalene

[ skā′lēn′ ]

Having three unequal sides, as a triangle that is neither equilateral nor isosceles.