Archaeozoic era

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• 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… …   The Collaborative International Dictionary of English

• Archaeozoic — /ˌakiəˈzoʊɪk / (say .ahkeeuh zohik) adjective 1. relating to the most ancient period of the earth s history, during which the earliest forms of life presumably appeared. –noun 2. the Archaeozoic era. 3. Geology the series of rocks preceding the… …  

• Archaeozoic — archaeozoic, Archaeozoic Ar ch[ae]*o*zo ic, a. [Gr. archai^os ancient + zw^,on animal.] (Zo[ o]l.) 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… …   The Collaborative International Dictionary of English

• archaeozoic — archaeozoic, Archaeozoic Ar ch[ae]*o*zo ic, a. [Gr. archai^os ancient + zw^,on animal.] (Zo[ o]l.) 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… …   The Collaborative International Dictionary of English

• archaeozoic — adjective of or belonging to earlier of two divisions of the Precambrian era archeozoic life forms • Syn: ↑archeozoic • Similar to: ↑early • Derivationally related forms: ↑Archaeozoic, ↑Archeozoic (for: ↑ …   Useful english dictionary

• archaeozoic — adj. referring to the earliest geological era …   English contemporary dictionary

• archaeozoic —   a. living in the earliest geological era …   Dictionary of difficult words

• Archeozoic — n. 1. 1 the time from 1.5 billion to 5 billion years ago, when the earth s crust was formed; the time when only unicellular organisms and the earliest forms of life are present. Same as {Archaeozoic}. Syn: Archaeozoic, Archeozoic era, Archaeozoic …   The Collaborative International Dictionary of English

• archeozoic — adjective of or belonging to earlier of two divisions of the Precambrian era archeozoic life forms • Syn: ↑archaeozoic • Similar to: ↑early • Derivationally related forms: ↑Archaeozoic (for: ↑ …   Useful english dictionary

• Archeozoic — noun the time from 3,800 million years to 2,500 million years ago; earth s crust formed; unicellular organisms are earliest forms of life • Syn: ↑Archean, ↑Archean eon, ↑Archean aeon, ↑Archaeozoic, ↑Archeozoic eon, ↑Archaeozoic aeon •… …   Useful english dictionary

• Proterozoic — /proʊtərəˈzoʊɪk / (say prohtuhruh zohik) adjective 1. of or relating to a geological era or rocks preceding the Palaeozoic. –noun 2. the era or rocks intervening between Archaeozoic and Palaeozoic, presumed to be characterised by relative… …