I. ˈtē-thəs noun
Etymology: Latin, from Greek Tēthys
Date: 1567
: a Titaness and wife of Oceanus
II. ˈtē-thəs geographical name
hypothetical sea believed to have extended into E Pangaea & later to have separated Laurasia to the N & Gondwanaland to the S with the Mediterranean being a remnant of it
• Te·thy·an -thē-ən adjective