sca·lene

[skey-leen]
adjective
1.
Geometry.
a.
(of a cone or the like) having the axis inclined to the base.
b.
(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

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World English Dictionary
scalene (ˈskeɪliːn) [Click for IPA pronunciation guide]
 
adj
1.  maths (of a triangle) having all sides of unequal length
2.  anatomy of or relating to any of the scalenus muscles
 
[C17: from Late Latin scalēnus with unequal sides, from Greek skalēnos]

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00:10
Scalene is always a great word to know.
So is middle ear. Does it mean:
the middle portion of the ear, consisting of the tympanic membrane and an air-filled chamber lined with mucous membrane, that contains the malleus, incus, and stapes.
the part of the trunk between the neck and the abdomen, enclosed by the ribs, sternum, and vertebrae, which contains the heart and lungs; the chest
Etymonline
Word Origin & History

scalene
"having unequal sides," 1684, from L.L. scalenus, from Gk. skalenos "uneven, unequal, rough," from skallein "chop, hoe," related to skelos "leg" (lit. "bending") and skolios "crooked," from PIE *(s)qel- "crooked, curved, bent, perverted."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
scalene   (skā'lēn')  Pronunciation Key 
Having three unequal sides, as a triangle that is neither equilateral nor isosceles.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
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.
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