1. τρῐάς · trias — LSJ
the number three, triad
the number three, triad, Ion Hist. 12 note, Pl. Phd. 104a, al.; on its significance in the Pythag. philosophy, v. Arist. Cael. 268a13, Metaph. 1081a34, b12; τρισσὴν . . ἐτέων τριάδα (sc. γεγονώς), i. e. nine years old, Syria 5.338 (Sidon); τ. ἡ ἀκατονόμαστος, of the mystical Man from heaven (θεός—ἄγγελος—ἄνθρωπος παθητός), Zos.Alch. p.230B.
2 group of three days, third day
ἡ τ. group of three days, τελευτᾷ ἐν τῇ πρώτῃ τ. Thphr. Vent. 49; the third day, Ph. 1.13.
3 system of three strophes
system of three strophes, Heph. p.61C.
4 Trinity
ἡ ἁγία T. the holy Trinity, Cod. Just. 1.1.5.2, etc.