Classical Mythology. a Titan, a daughter of Uranus and Gaea, the wife of Oceanus and mother of the Oceanids and river gods.
Astronomy. one of the moons of Saturn.
Geology. the Mesozoic ocean or seaway of which the Mediterranean Sea is a greatly shrunken remnant.
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Tethys1 (ˈtiːθɪs, ˈtɛθ-)
Greek myth a Titaness and sea goddess, wife of Oceanus

Tethys2 (ˈtiːθɪs, ˈtɛθ-)
a large satellite of the planet Saturn

Tethys3 (ˈtiːθɪs, ˈtɛθ-)
See also Pangaea the sea that lay between Laurasia and Gondwanaland, the two supercontinents formed by the first split of the larger supercontinent Pangaea. The Tethys Sea can be regarded as the predecessor of today's smaller Mediterranean

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

geologists' name for the sea that anciently lay between Eurasia and Africa-Arabia, 1893, from the name of a Gk. sea goddess, sister and consort of Oceanus.
Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Britannica


major regular moon of Saturn, remarkable for a fissure that wraps around the greater part of its circumference. It was discovered in 1684 by the Italian-born French astronomer Gian Domenico Cassini and named for a Titan in Greek mythology.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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