tetraeterid

== English == === Etymology === From Late Latin tetraeteris, from Ancient Greek τετραετηρίς (tetraetērís), from τετρα- (tetra-, “four”) + ἔτος (étos, “year”). === Pronunciation === (General American) IPA(key): /ˌtɛtrəˈɛdərəd/ (Received Pronunciation) IPA(key): /ˌtɛtrəˈɛtərɪd/ === Noun === tetraeterid (plural tetraeterids) Alternative form of tetraeteris: A four-year period, particularly (historical) those used in ancient Egyptian and Greek astronomical calculations. === References === “tetra-, comb. form”, in OED Online ⁠, Oxford: Oxford University Press, 2022.