| 单词 | epoch |
| 释义 | Word Frequency epoch(ˈiːpɒk) noun 1. a point in time beginning a new or distinctive period the invention of nuclear weapons marked an epoch in the history of warfare 2. a long period of time marked by some predominant or typical characteristic; era 3. astronomy a precise date to which information, such as coordinates, relating to a celestial body is referred 4. geology a unit of geological time within a period during which a series of rocks is formed the Pleistocene epoch 5. physics the displacement of an oscillating or vibrating body at zero time Derived forms epochal (ˈɛpˌɒkəl) adjective epochally (ˈepˌochally) adverb Word origin C17: from New Latin epocha, from Greek epokhē cessation; related to ekhein to hold, have |
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