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archaeozoic n. 始生代[的] 始生代[的] archaeozoic adj 1: of or belonging to earlier of two divisions of the Precambrian era; "archeozoic life forms" [synonym: {archeozoic}, {archaeozoic}] n 1: the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life [synonym: {Archean}, {Archean eon}, {Archean aeon}, {Archeozoic}, {Archaeozoic}, {Archeozoic eon}, {Archaeozoic aeon}] Archaeozoic \Archaeozoic\ n. [Gr. 'archai^os ancient zw^,on
animal.] the time from 1.5 billion to 5 billion years ago; the time when the earth's crust formed; a time when only unicellular organisms and the earliest forms of life are present. Syn: Archeozoic, Archeozoic era, Archaeozoic era [WordNet 1.5] archaeozoic \archaeozoic\, Archaeozoic \Ar`ch[ae]*o*zo"ic\, a. [Gr. 'archai^os ancient zw^,on animal.] (Zool.) Like or belonging to the earliest forms of animal life. [1913 Webster] 2. (Geol.) formed in or belonging to the earlier of two divisions of the Precambrian era. archaeozoic life forms Syn: archeozoic [WordNet 1.5]
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