Tonian

//ˈtəʊ.ni.ən// adj, name

adj, name ·Rare ·Advanced level

Definitions

Adjective
  1. 1
    Of a geologic period within the Neoproterozoic era from about 1000 to 850 million years ago. not-comparable
Proper Noun
  1. 1
    The Tonian period.

Etymology

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

More for "tonian"

SynonymsSentencesPronunciationTranslate

Next best steps

Find stronger synonymsSee usage examplesCheck pronunciationBrowse writing guides

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.