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coetaneity

noun
co·​e·​ta·​ne·​i·​ty | \ ˌkōə̇təˈnēə̇tē\
plural -es

Definition of coetaneity

: the quality or state of being coetaneous

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History and Etymology for coetaneity

Latin coaetaneus of the same age (from co- + aetas age) + English -ity

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