aeon

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ae·on, eon /ˈiːən/ noun [countable]  LONG TIMEan extremely long period of time 极长的时期，万古

Examples from the Corpus

aeon• For an aeon of time the words meant nothing.• And the cast, leaping from aeon to aeon, does a remarkable job.• Minute after minute, aeon after aeon, Nothing lets up or develops.• For our decade-conscious brains, an event that happens only once per aeon is so rare as to seem a major miracle.• The seas powdering our bones like quartz, making sand, grinding our peace for us by the aeon.

ae·on nounChineseSyllable  

time period an of extremely Corpus long

aeon
ae‧on , eon /ˈiːən/ noun [countable]
an extremely long period of time

aeon (BrE) (also eon NAmE, BrE ) BrE /ˈiːən/ 🔊NAmE /ˈiːən/ 🔊 noun(formal) an extremely long period of time; thousands of years 极漫长的时期；千万年(geology 地质学) a major division of time, divided into eras 宙（地质学上的年代分期，下分代）◆aeons of geological history数以亿万年计的地质史