奥陶纪

奧陶紀

Àotáojì

noun

Meanings

1 Ordovician (geological period, ~485–444 million years ago)

Characters

geological period

Examples

奥陶纪是海洋生物大爆发的时期。

Àotáojì shì hǎiyáng shēngwù dà bàofā de shíqī.

The Ordovician was a period of major diversification of marine life.

三叶虫在奥陶纪非常繁盛。

Sānyèchóng zài Àotáojì fēicháng fánshèng.

Trilobites flourished during the Ordovician.

Tips

culture

奥陶 (Àotáo) is a phonetic transcription of "Ordovices," an ancient Welsh tribe — the geological period was named after rocks first studied in their territory. 纪 (jì) means "period" in geology (cf. 侏罗纪 Zhūluójì = Jurassic, 白垩纪 Bái'èjì = Cretaceous).

Stroke Order

奥 ào

陶 táo

纪 jì