adjective Geology relating to or denoting the later part of the Precambrian aeon (between the Archaean aeon and the Cambrian period, about 2,500 to 570 million years ago), in which the earliest forms of life evolved.
C19: from Gk proteros 'former' + zōē 'life', zōos 'living' + -ic.

English new terms dictionary. 2014.

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  • proterozoic — PROTEROZÓIC, Ă, proterozoici, ce, subst., adj. (geol.) Algonchian. [pr.: zo ic] – Din fr. protérozoïque, engl. proterozoic. Trimis de ana zecheru, 13.09.2007. Sursa: DEX 98  PROTEROZÓIC adj., s. v …   Dicționar Român

  • Proterozoic — [prät΄ə rə zō′ik, prōt΄ə rō zō′ik] adj. [< Gr proteros, former, compar. of pro, forward (see PRO 1) + ZO + IC] [sometimes p ] designating or of the geologic eon characterized by the development of sedimentary rock, shallow seas, and the first… …   English World dictionary

  • Proterozoic — The Proterozoic (pronEng|ˌproʊtərəˈzoʊɪk) is a geological eon representing a period before the first abundant complex life on Earth. The Proterozoic Eon extended from 2500 Ma to 542.0 ± 1.0 Ma (million years ago), and is the most recent part of… …   Wikipedia

  • Proterozoic — adjective Etymology: Greek proteros former, earlier (from pro before) + International Scientific Vocabulary zoic more at for Date: 1899 of, relating to, or being the eon of geologic time or the corresponding segment of rocks that includes the… …   New Collegiate Dictionary

  • Proterozoic — /prot euhr euh zoh ik, proh teuhr /, Geol. adj. 1. noting or pertaining to the latter half of the Precambrian Era, from about 2.5 billion to 570 million years ago, characterized by the appearance of bacteria and marine algae; Algonkian. n. 2. the …   Universalium

  • Proterozoic — 1. adjective Of, or relating to the geologic eon from about 2,500 to 570 million years ago; comprises the Paleoproterozoic, Mesoproterozoic and Neoproterozoic eras; marked by the build up of oxygen in the atmosphere and the emergence of primitive …   Wiktionary

  • Proterozoic — Prot•er•o•zo•ic [[t]ˌprɒt ər əˈzoʊ ɪk, ˌproʊ tər [/t]] adj. 1) gel noting or pertaining to the latter half of the Precambrian Era, from about 2.5 billion to 570 million years ago, when bacteria and marine algae were the principal forms of life 2) …   From formal English to slang

  • proterozoic — proterozojus statusas T sritis ekologija ir aplinkotyra apibrėžtis Antroji Žemės geologinės istorijos antroji era, prasidėjusi prieš 2,6 mlrd. m., po archėjaus, pasibaigusi prieš 570 mln. m. prieš paleozojų; per tą laikotarpį susidariusių uolienų …   Ekologijos terminų aiškinamasis žodynas

  • proterozoic —   an eon of geologic time lasting from 2500m to 570m years ago …   Geography glossary

  • proterozoic — pro|te|ro|zoic Mot Agut Adjectiu variable …   Diccionari Català-Català

  • proterozóic — adj. m. (sil. zo ic), pl. proterozóici; f. sg. proterozóicã, pl. proterozóice …   Romanian orthography

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