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Tethys1 definition

Te·thys (tē′t̸his)

noun

  1. Gr. Myth. a daughter of Uranus and wife of Oceanus, by whom she is the mother of the Oceanides
  2. a satellite of Saturn having long trenchlike valleys and sharing its orbit with other satellites

Etymology: L < Gr Tēthys

Tethys2 definition

Te·thys (tē′t̸his)

an ancient sea and geosyncline, especially of the Mesozoic and early Cenozoic eras that separated Laurasia from Gondwana

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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