English Dictionary

Iapetus

/aɪˈæpɪtəs/

name

(Greek mythology) A Titan, the son of Uranus and Gaia, and father of Atlas, Prometheus, Epimetheus, and Menoetius. / (astronomy) The third largest moon of Saturn

Iapetus was one of the Titans in Greek mythology.

意味（1）

(Greek mythology) A Titan, the son of Uranus and Gaia, and father of Atlas, Prometheus, Epimetheus, and Menoetius.

意味（2）

(astronomy) The third largest moon of Saturn

意味（3）

(geology) An ancient ocean which existed between 600 and 400 million years ago.

So, in the early Ordovician, Iapetus was wide enough to have one side in high latitudes and the other in the tropics: a massive ocean, indeed.