English Explanatory Dictionary

Tonian

English dictionary entry

Meanings

adj
  1. Of a geologic period within the Neoproterozoic era from about 1000 to 850 million years ago.
name
  1. The Tonian period.

Pronunciation

/ˈtəʊ.ni.ən/ /ˈtoʊ.ni.ən/

Word forms

Tonian

Etymology

From Ancient Greek τόνος (tónos, “stretch”).

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