tethys Meaning, Definition & Usage

  1. noun (Greek mythology) a Titaness and sea goddess; wife of Oceanus
  2. noun type genus of the family Aplysiidae
    Aplysia; genus Tethus; genus Aplysia.

WordNet


Te"thys noun
Etymology
NL., fr. Gr. an oyster, or a kind of ascidian.
Definitions
  1. (Zoöl.) A genus of a large naked mollusks having a very large, broad, fringed cephalic disk, and branched dorsal gills. Some of the species become a foot long and are brilliantly colored.

Webster 1913