aeon
/ˈiːən/( <美, 技> 亦作eon)
noun
(常作aeons)
1- an indefinite and very long period of time, especially a period exaggerated for humorous or rhetorical effect极漫长的时期; 万古（尤指为产生幽默或修辞效果而采用的夸张说法）：
the shows were made aeons ago.
这些节目是在很久很久以前制作的。
1.1
- Astronomy & Geology a unit of time equal to a thousand million years【天文, 地质】十亿年, 京年。
1.2
- Geology a major division of geological time, subdivided into eras【地质】宙：
the Precambrian aeon.
前寒武宙。
1.3
- Philosophy (in Neoplatonism, Platonism, and Gnosticism) a power existing from eternity; an emanation or phase of the supreme deity【哲】（新柏拉图派哲学、柏拉图派哲学和诺斯替教派）伊涌。
词源
mid 17th cent.: via ecclesiastical Latin from Greek aiōn 'age'.