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alternation

/ˈɒl.tə(ɹ)ˌneɪ.ʃən/ noun

Latin root: alternatio Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about alternation at Wordnik → Where our words come from →

  1. Successive change from one thing or state to another and back again.
    a trill is a rapid alternation between the two notes

Origin

Learned borrowing from Latin alternatio; compare French alternation. By surface analysis, alternate + -ion.

From Wiktionary, via Kaikki.org (CC BY-SA)