Siderian

发音

/saɪˈdɪəri.ən/
/sɪ-/

词形变化

more Siderian 比较级 most Siderian 最高级

释义与例句

adj.
  1. 1.

    Of a geologic period within the Paleoproterozoic era from about 2500 to 2300 million years ago.

    地质
name
  1. 1.

    The Siderian period.

    地质

词源

From Greek sideros.

来源：wiktionary