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WordNet (3.0)
period
(n)a unit of geological time during which a system of rocks formed, Syn.geological period
CC-CEDICT CN-EN Dictionary
侏罗纪
[侏 罗 纪 / 侏 羅 紀, Zhū luō jì, ㄓㄨ ㄌㄨㄛ ㄐㄧˋ]Jurassic (geological period 205-140m years ago)#47203[Add to Longdo]
第四纪
[第 四 纪 / 第 四 紀, dì sì jì, ㄉㄧˋ ㄙˋ ㄐㄧˋ]fourth period; quaternary (geological period covering the recent ice ages over the last 180, 000 years)#57640[Add to Longdo]
白垩纪
[白 垩 纪 / 白 堊 紀, Bái è jì, ㄅㄞˊ ㄜˋ ㄐㄧˋ]Cretaceous (geological period 140-65m years ago)#63767[Add to Longdo]
寒武纪
[寒 武 纪 / 寒 武 紀, Hán wǔ jì, ㄏㄢˊ ㄨˇ ㄐㄧˋ]Cambrian (geological period 545-495m years ago)#68780[Add to Longdo]
三叠纪
[三 叠 纪 / 三 疊 紀, Sān dié jì, ㄙㄢ ㄉㄧㄝˊ ㄐㄧˋ]Triassic (geological period 250-205m years ago)#81486[Add to Longdo]
二叠纪
[二 叠 纪 / 二 疊 紀, Èr dié jì, ㄦˋ ㄉㄧㄝˊ ㄐㄧˋ]Permian (geological period 292-250m years ago)#81793[Add to Longdo]
泥盆纪
[泥 盆 纪 / 泥 盆 紀, Ní pén jì, ㄋㄧˊ ㄆㄣˊ ㄐㄧˋ]Devonian (geological period 417-354m years ago)#97251[Add to Longdo]
石炭纪
[石 炭 纪 / 石 炭 紀, Shí tàn jì, ㄕˊ ㄊㄢˋ ㄐㄧˋ]Carboniferous (geological period 354-292m years ago)#98259[Add to Longdo]
全新世
[全 新 世, Quán xīn shì, ㄑㄩㄢˊ ㄒㄧㄣ ㄕˋ]Holocene (geological period covering approx 12000 years since the last ice age)#106556[Add to Longdo]
奥陶纪
[奥 陶 纪 / 奧 陶 紀, Ào táo jì, ㄠˋ ㄊㄠˊ ㄐㄧˋ]Ordovician (geological period 495-440m years ago)#109545[Add to Longdo]
志留纪
[志 留 纪 / 志 留 紀, Zhì liú jì, ㄓˋ ㄌㄧㄡˊ ㄐㄧˋ]Silurian (geological period 440-417m years ago)#152030[Add to Longdo]
三迭纪
[三 迭 纪 / 三 迭 紀, sān dié jì, ㄙㄢ ㄉㄧㄝˊ ㄐㄧˋ]Triassic (geological period 250-205m years ago); also written 三疊紀|三叠纪[Add to Longdo]
二迭纪
[二 迭 纪 / 二 迭 紀, èr dié jì, ㄦˋ ㄉㄧㄝˊ ㄐㄧˋ]Permian (geological period 292-250m years ago); also written 二疊紀|二叠纪[Add to Longdo]
前寒武纪
[前 寒 武 纪 / 前 寒 武 紀, Qián Hán wǔ jì, ㄑㄧㄢˊ ㄏㄢˊ ㄨˇ ㄐㄧˋ]pre-Cambrian (geological period before c. 540m years ago)[Add to Longdo]
白垩世
[白 垩 世 / 白 堊 世, bái è shì, ㄅㄞˊ ㄜˋ ㄕˋ]Cretaceous (geological period)[Add to Longdo]
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