English

Adjective

Cryogenian ‎(comparative more Cryogenian, superlative most Cryogenian)

1. (geology) Of a geologic period within the Neoproterozoic era from about 850 to 600 million years ago.

Proper noun

Cryogenian

1. (geology) The Cryogenian period.

Translations

See also

• Appendix:Geologic timescale