English

Proper noun

Calymmian

1. (geology) the Calymmian period

Translations

Adjective

Calymmian ‎(comparative more Calymmian, superlative most Calymmian)

1. (geology) of a geologic period within the Mesoproterozoic era from about 1600 to 1400 million years ago

See also

• Appendix:Geologic timescale