early 15c., from Latin titan, from Greek titan, member of a mythological race of giants (originally six sons and six daughters of Gaia and Uranus) who were overthrown by Zeus and the other gods. The war was a popular theme for Greek artists and writers. The name is perhaps from tito "sun, day," which probably is a loan-word from a language of Asia Minor. Sense of "person or thing of enormous size or ability" first recorded 1828. Applied to planet Saturn's largest satellite in 1831; it was discovered 1655 by Dutch astronomer Christiaan Huygens, who named it Saturni Luna "moon of Saturn." Related: Titaness; titanian.