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con·cen·tric

(kən-sĕntrĭk) also con·cen·tri·cal (-trĭ-kəl)

adj.

Having a common center.

[Middle English concentrik, from Medieval Latin concentricus : Latin com-, com- + Latin centrum, center; see CENTER.]

con·centri·cal·ly adv.

con′cen·trici·ty (kŏn′sĕn-trĭsĭ-tē) n.

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concentric

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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