What does "coetaneity" mean?

The condition of being coetaneous.

How do you pronounce "coetaneity"?

Pronounced //ˌkoʊ.ɪ.təˈni.ɪ.ti//.

Common synonyms include: accompaniment, agreement, coexistence, coincidence, concurrence, synchronism.

/ˌkoʊ.ɪ.təˈni.ɪ.ti/ noun

noun ·Rare ·Advanced level

Noun

By surface analysis, coet(aneous) + -aneity.