Tonian

== English == === Etymology === From Ancient Greek τόνος (tónos, “stretch”). === Pronunciation === (Received Pronunciation) IPA(key): /ˈtəʊ.ni.ən/ (General American) IPA(key): /ˈtoʊ.ni.ən/ Rhymes: -əʊniən === Adjective === Tonian (not comparable) (geology) Of a geologic period within the Neoproterozoic era from about 1000 to 850 million years ago. === Proper noun === Tonian (geology) The Tonian period. ==== Translations ==== === See also === Appendix:Geologic timescale === Anagrams === nation, anoint, 'nation, Nation