Definitions

1. noun

The second-largest moon of Saturn, a pale icy body with a surface of water ice mixed with darker organic material.

“The astronomers spent years studying the unique features of Iapetus, a moon that orbits Saturn.”

2. proper noun

Iapetus, a Titan in Greek mythology, son of Uranus and the sea goddess Thetis, and father of Atlas, Prometheus, Epimetheus, and Menoetius.

“In Greek mythology, Iapetus was a powerful Titan who played a significant role in the war against the Olympian gods.”