thetis thetine • Thetis · · · Info · Definitions · Characters · · thetis · · Text Latin · · Script 6 · · Length 2 · · Syllables Definitions · · · (noun) (Greek mythology) one of the 50 Nereids; mother of Achilles by Peleus. Synonyms: Thetis. · · Noun Definition 1 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 s latin small letter s U+0073 t latin small letter t U+0074