Tonian

发音

UK /ˈtəʊ.ni.ən/
US /ˈtoʊ.ni.ən/

释义与例句

adj.
  1. 1.

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

    地质
name
  1. 1.

    The Tonian period.

    地质

词源

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

来源：wiktionary