'Tethys' definitions:

Definition of 'Tethys'

noun

(Greek mythology) a Titaness and sea goddess; wife of Oceanus

noun

Type genus of the family Aplysiidae [syn: Aplysia, genus Aplysia, Tethys, genus Tethus]

Definition of 'Tethys'

From: GCIDE

Tethys \Te"thys\, n. [NL., fr. Gr. ? an oyster, or ? a kind of ascidian.] (Zool.) 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. [1913 Webster]

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