| 单词 | eon |
| 释义 | eon (once / 16577 pages) 1n 2n An eon is a really, really, super-long, impossible-to-measure length of time. If you sit down to dinner hanging your head and moaning that it's been an eon since you ate anything, you’re exaggerating. Four hours ago is not an eon. Eon goes back to the Greek aiōn, "age." An age is not easy to measure, and neither is an eon. Both are just really long periods of time, but in science an eon is about a billion years. You can use the noun eon for anything that takes a long while, including how long it will be before another planet collides with Earth or how many days until summer vacation starts — one is an eon, the other feels like an eon, or forever. WORD FAMILYeon: eonian, eons USAGE EXAMPLESThe first period made that seem like eons ago. Los Angeles Times(Nov 26, 2016) We seem to be cosmically special, perhaps even unique — at least as far as we are likely to know for eons. Washington Post(Nov 25, 2016) Scientists said Wednesday that Pluto may have rolled over on its axis eons ago, the result of tidal forces with jumbo moon Charon. Seattle Times(Nov 16, 2016) 1 1n the longest division of geological time Syn|Exp|Hyper aeon Phanerozoic aeon the period from about 5,400 million years ago until the present Precambrian periodthe eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago Proterozoic aeonfrom 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms Archaeozoic aeonthe time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life Priscoan aeonthe earliest eon in the history of the Earth from the first accretion of planetary material (around 4,600 million years ago) until the date of the oldest known rocks (about 3,800 million years ago); no evidence of life geologic time, geological time the time of the physical formation and development of the earth (especially prior to human history) 2n an immeasurably long period of time 2oh, that happened eons ago Syn|Hyper aeon age, long time, years a prolonged period of time n (Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe Syn|Hyper aeon spiritual being, supernatural being an incorporeal being believed to have powers to affect the course of human events |
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