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oc·ta·gon

(ŏktə-gŏn′)

A polygon with eight sides and eight angles.

[Latin octagōnon, from Greek oktagōnon, from neuter of oktagōnos, octagonal : okta-, octo- + -gōnos, angled; see -GON.]

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octagon

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:

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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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