ˈtēthə̇s noun
Usage: capitalized
Etymology: New Latin, from Latin Tethys, wife of Oceanus and mother of sea nymphs and deities, from Greek Tēthys
: a genus (the type of the family Tethyidae) of large often conspicuously colored sluglike marine mollusks having a pair of lateral swimming lobes on the foot and four tentacles, occurring chiefly in the warmer seas, and including forms that emit a purple fluid when disturbed — see sea hare