Definitions for proterozoic
ˌprɒt ər əˈzoʊ ɪk, ˌproʊ tər-pro·tero·zoic

Princeton's WordNetRate this definition:0.0 / 0 votes

1. Proterozoic, Proterozoic eon, Proterozoic aeonadjective

   from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms

2. proterozoicadjective

   formed in the later of two divisions of the Precambrian era

   "proterozoic life forms"

WiktionaryRate this definition:3.0 / 2 votes

1. Proterozoicadjective

   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 multicellular life.

2. Proterozoicnoun

   The Proterozoic eon.

WikipediaRate this definition:0.0 / 0 votes

1. Proterozoic

   The Proterozoic ( ) is a geological eon spanning the time interval from 2500 to 538.8 million years ago. It is the most recent part of the Precambrian "supereon". It is also the longest eon of the Earth's geologic time scale, and it is subdivided into three geologic eras (from oldest to youngest): the Paleoproterozoic, Mesoproterozoic, and Neoproterozoic.The Proterozoic covers the time from the appearance of oxygen in Earth's atmosphere to just before the proliferation of complex life (such as trilobites or corals) on the Earth. The name Proterozoic combines two forms of ultimately Greek origin: protero- meaning 'former, earlier', and -zoic, 'of life'.The well-identified events of this eon were the transition to an oxygenated atmosphere during the Paleoproterozoic; the evolution of eukaryotes; several glaciations, which produced the hypothesized Snowball Earth during the Cryogenian Period in the late Neoproterozoic Era; and the Ediacaran Period (635 to 538.8 Ma) which is characterized by the evolution of abundant soft-bodied multicellular organisms and provides us with the first obvious fossil evidence of life on earth.

ChatGPTRate this definition:0.0 / 0 votes

1. proterozoic

   The Proterozoic is a geological eon representing a period in Earth's history that extends from about 2.5 billion to 541 million years ago, making it the period of time just before the proliferation of complex life on Earth. It is characterized by the first development of stable continents, the appearance of multicellular life, and the first signs of oxygen in the atmosphere.

FreebaseRate this definition:3.5 / 2 votes

1. Proterozoic

   The Proterozoic is a geological eon representing the time just before the proliferation of complex life on Earth. The name Proterozoic comes from Greek and means "earlier life". The Proterozoic Eon extended from 2,500 Ma to 542.0±1.0 Ma, and is the most recent part of the informally named "Precambrian" time. It is subdivided into three geologic eras: the Paleoproterozoic, Mesoproterozoic, and Neoproterozoic. The well-identified events of this eon were the transition to an oxygenated atmosphere during the Mesoproterozoic; several glaciations, including the hypothesized Snowball Earth during the Cryogenian period in the late Neoproterozoic; and the Ediacaran Period which is characterized by the evolution of abundant soft-bodied multicellular organisms.

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1. • Geology

How to pronounce proterozoic?

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How to say proterozoic in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of proterozoic in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of proterozoic in Pythagorean Numerology is: 7

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