| 释义 |
EoceneenUK
E·o·cene E0170000 (ē′ə-sēn′)adj. Of, relating to, or being the epoch of geologic time from about 56 to 34 million years ago, the second epoch of the Tertiary Period. It is characterized by warm climates, the rise of most modern mammalian families, and the formation of the Himalayas. See Table at geologic time.n. The Eocene Epoch.Eocene (ˈiːəʊˌsiːn) adj (Palaeontology) of, denoting, or formed in the second epoch of the Tertiary period, which lasted for 20 000 000 years, during which hooved mammals appearedn (Palaeontology) the Eocene the Eocene epoch or rock series[C19: from eo- + -cene]E•o•cene (ˈi əˌsin)
adj. 1. noting or pertaining to an epoch of the Tertiary Period, occurring from 55 million to 40 million years ago, characterized by the advent of the modern mammalian orders. n. 2. the Eocene Epoch or Series. [1831; eo- + -cene] E·o·cene (ē′ə-sēn′) The second epoch of the Tertiary Period, from about 58 to 37 million years ago, characterized by warm climates and the rise of most modern families of mammals. See Chart at geologic time.Thesaurus| Noun | 1. |  Eocene - from 58 million to 40 million years ago; presence of modern mammalsEocene epochTertiary, Tertiary period - from 63 million to 2 million years ago |
TranslationseocenoéocèneeoceneeocenicoEoceneenUK
Eocene Geology of, denoting, or formed in the second epoch of the Tertiary period, which lasted for 20 000 000 years, during which hooved mammals appeared Eocene[′ē·ə‚sēn] (geology) The next to the oldest of the five major epochs of the Tertiary period (in the Cenozoic era). EoceneenUK
Eocene a geological epoch lasting from 54 to 38 million years ago; a subdivision of the TERTIARY PERIOD. During this time extensive planktonic populations of Foraminifera laid down beds of rock (from which the pyramids of Egypt were built), and many groups of mammals appeared for the first time, for example, rodents, whales, carnivores. Britain was still moving northwards. See GEOLOGICAL TIME.EoceneenUK
Related to Eocene: Paleocene, OligoceneSynonyms for Eocenenoun from 58 million to 40 million years agoSynonymsRelated Words |