Tonian

English

Etymology

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Adjective

Tonian (not comparable)

  1. (geology) Of a geologic period within the Neoproterozoic era from about 1000 to 850 million years ago.

Proper noun

Tonian

  1. (geology) The Tonian period.

Translations

See also
  • Appendix:Geologic timescale

Anagrams
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