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quad·ran·gle (kwŏdrăng′gəl)
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n.
1. Mathematics A quadrilateral.
2.
a. A rectangular area surrounded on all four sides by buildings.
b. The buildings bordering this area.
3. The area of land shown on one atlas sheet charted by the US Geological Survey.
[Middle English, from Old French, from Late Latin quadrangulum, from Latin, neuter of quadrangulus, four-cornered : quadri-, quadri- + angulus, angle.]
quad·rangu·lar (-rănggyə-lər) adj.
quad·rangu·lar·ly adv.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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