from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having three unequal sides. Used of triangles.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having each of its three sides of different lengths.
  • n. A scalene muscle.

from the GNU version of the Collaborative International Dictionary of English

  • adj.
  • adj. Having the sides and angles unequal; -- said of a triangle.
  • adj. Having the axis inclined to the base, as a cone.
  • adj.
  • adj. Designating several triangular muscles called scalene muscles.
  • adj. Of or pertaining to the scalene muscles.
  • n. A triangle having its sides and angles unequal.

from The Century Dictionary and Cyclopedia

  • In mathematics, having three sides unequal: noting a triangle so constructed.
  • In anatomy: Obliquely situated and unequal-sided, as a muscle: specifically said of the scaleni. See scalenus.
  • Pertaining to a scalene muscle.
  • n. A scalene triangle.
  • n. One of the scalene muscles. See scalenus.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. of or relating to any of the scalene muscles
  • adj. of a triangle having three sides of different lengths


Late Latin scalēnus, from Greek skalēnos, from skallein, to hoe, stir up.
(American Heritage® Dictionary of the English Language, Fourth Edition)



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