Hypernym

period 4

noun

a unit of geological time during which a system of rocks formed

Part_meronym

Paleoproterozoic 1

noun

The Paleoproterozoic (also spelled Palaeoproterozoic) is the first of the three eras of the Proterozoic occurring between 2,500 to 1,600 million years ago.

Rhyacian 1

noundomain: time

EnWordnet [ver.5.0]

English

Definition

The Rhyacian is the second geologic period in the Paleoproterozoic Era and lasted from 2300 to 2050 million years ago.

Examples

1.The first known eukaryotes began to evolve in the Rhyacian period.

Part_holonym

Paleoproterozoic 1

noun

The Paleoproterozoic (also spelled Palaeoproterozoic) is the first of the three eras of the Proterozoic occurring between 2,500 to 1,600 million years ago.

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