Definition of Proterozoic in English:

Proterozoic

adjective ˌprəʊt(ə)rəˈzəʊɪkˌproʊdərəˈzoʊɪk

Geology

1Relating to or denoting the aeon that constitutes the later part of the Precambrian, between the Archaean aeon and the Cambrian period, in which the earliest forms of life evolved.
〔地质〕元古代的；元古代岩的
Example sentencesExamples
- Archean and most Proterozoic sedimentary rocks are notable for their distinct lack of any bioturbated textures.
- The bulk of the Mozambique belt of eastern Africa and Madacascar is underlain by deeply eroded and multiply deformed high-grade Proterozoic and Archaean rocks.
- The key to understanding the early evolution of eukaryotes lies in the Proterozoic fossil record, especially microfossils.
- This is the general name for all Archaean and Proterozoic basement gneisses of the NW Scotland mainland and Outer Hebrides.
- No rock standard has been identified formally as marking the base; at the top of the Proterozoic the Cambrian - Precambrian boundary is identified on the basis of fossils.
1. 1.1as noun the Proterozoic The Proterozoic aeon or the system of rocks deposited during it.
  元古代；元古代岩系

The Proterozoic lasted from about 2,500 to 570 million years ago. For millions of years only bacteria and single-celled organisms existed, and the early invertebrates that followed were soft-bodied and rarely left any trace in the form of fossils

Origin

Late 19th century: from Greek proteros 'former' + zōē 'life', zōos 'living' + -ic.

Definition of Proterozoic in US English:

Proterozoic

adjectiveˌproʊdərəˈzoʊɪkˌprōdərəˈzōik

Geology

1Relating to or denoting the eon that constitutes the later part of the Precambrian, between the Archean eon and the Cambrian period, in which the earliest forms of life evolved.
〔地质〕元古代的；元古代岩的
The Proterozoic lasted from about 2,500 million to 570 million years ago. For millions of years only bacteria, algae, and other simple organisms existed, and the early invertebrates that followed were soft-bodied and rarely left any trace in the form of fossils
Example sentencesExamples
- The key to understanding the early evolution of eukaryotes lies in the Proterozoic fossil record, especially microfossils.
- Archean and most Proterozoic sedimentary rocks are notable for their distinct lack of any bioturbated textures.
- The bulk of the Mozambique belt of eastern Africa and Madacascar is underlain by deeply eroded and multiply deformed high-grade Proterozoic and Archaean rocks.
- No rock standard has been identified formally as marking the base; at the top of the Proterozoic the Cambrian - Precambrian boundary is identified on the basis of fossils.
- This is the general name for all Archaean and Proterozoic basement gneisses of the NW Scotland mainland and Outer Hebrides.
1. 1.1as noun the Proterozoic The Proterozoic eon or the system of rocks deposited during it.
  元古代；元古代岩系

Origin

Late 19th century: from Greek proteros ‘former’ + zōē ‘life’, zōos ‘living’ + -ic.

词汇	Proterozoic
释义	Definition of Proterozoic in English: Proterozoic adjective ˌprəʊt(ə)rəˈzəʊɪkˌproʊdərəˈzoʊɪk Geology 1Relating to or denoting the aeon that constitutes the later part of the Precambrian, between the Archaean aeon and the Cambrian period, in which the earliest forms of life evolved. 〔地质〕元古代的；元古代岩的 Example sentencesExamples Archean and most Proterozoic sedimentary rocks are notable for their distinct lack of any bioturbated textures. The bulk of the Mozambique belt of eastern Africa and Madacascar is underlain by deeply eroded and multiply deformed high-grade Proterozoic and Archaean rocks. The key to understanding the early evolution of eukaryotes lies in the Proterozoic fossil record, especially microfossils. This is the general name for all Archaean and Proterozoic basement gneisses of the NW Scotland mainland and Outer Hebrides. No rock standard has been identified formally as marking the base; at the top of the Proterozoic the Cambrian - Precambrian boundary is identified on the basis of fossils. 1.1as noun the Proterozoic The Proterozoic aeon or the system of rocks deposited during it. 元古代；元古代岩系 The Proterozoic lasted from about 2,500 to 570 million years ago. For millions of years only bacteria and single-celled organisms existed, and the early invertebrates that followed were soft-bodied and rarely left any trace in the form of fossils Origin Late 19th century: from Greek proteros 'former' + zōē 'life', zōos 'living' + -ic. Definition of Proterozoic in US English: Proterozoic adjectiveˌproʊdərəˈzoʊɪkˌprōdərəˈzōik Geology 1Relating to or denoting the eon that constitutes the later part of the Precambrian, between the Archean eon and the Cambrian period, in which the earliest forms of life evolved. 〔地质〕元古代的；元古代岩的 The Proterozoic lasted from about 2,500 million to 570 million years ago. For millions of years only bacteria, algae, and other simple organisms existed, and the early invertebrates that followed were soft-bodied and rarely left any trace in the form of fossils Example sentencesExamples The key to understanding the early evolution of eukaryotes lies in the Proterozoic fossil record, especially microfossils. Archean and most Proterozoic sedimentary rocks are notable for their distinct lack of any bioturbated textures. The bulk of the Mozambique belt of eastern Africa and Madacascar is underlain by deeply eroded and multiply deformed high-grade Proterozoic and Archaean rocks. No rock standard has been identified formally as marking the base; at the top of the Proterozoic the Cambrian - Precambrian boundary is identified on the basis of fossils. This is the general name for all Archaean and Proterozoic basement gneisses of the NW Scotland mainland and Outer Hebrides. 1.1as noun the Proterozoic The Proterozoic eon or the system of rocks deposited during it. 元古代；元古代岩系 Origin Late 19th century: from Greek proteros ‘former’ + zōē ‘life’, zōos ‘living’ + -ic.
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