octaeteris

== English == === Etymology === Borrowed from Ancient Greek ὀκταετηρίς (oktaetērís, “8-year [period]”). === Pronunciation === (General American) IPA(key): /ˌɑktaɪˈtɪɹɪs/ (Received Pronunciation) IPA(key): /ˌɒktaɪˈtɪəɹɪs/ === Noun === octaeteris (plural octaeterides) Synonym of octennium: An 8-year period, particularly (historical) in Greek calendrical and astronomical calculations. ==== Related terms ==== (adj.): octaeteric, octennial (4-year lunar cycle): tetraeteris, tetraeterid (19-year lunar cycle): Metonic cycle, enneadecaeteris (eight things): octad