1. τετράς · tetras — LSJ
the number four
the number four, Arist. Metaph. 1081b16, 1090b23, Ph. 1.22, Plu. Lyc. 5, etc.
2 the fourth day
the fourth day of the month, h.Merc. 19, Hes. Op. 794, 798, Ar. Nu. 1131, Th. 5.54, IG 1(2).304.50,62, etc.; so Boeot. πετράς (q.v.); τετράδι γέγονας, prov. of one born to a life of labour (cf. τετραδισταί II), Pl.Com. 100, cf. Aristonym. 4, Sannyr. 5.
b the fourth day of the week, Wednesday
the fourth day of the week, Wednesday, Cod.Just. 9.4.6.1.
3 a space of four days
a space of four days, Hp. Prog. 20.
4 quarters
the four quarters of the moon, Thphr. Sign. 5, 27, 38.
II
= τετραρχία I, Hellanic. 52 J.
III in four divisions
κατὰ τετράδα διατετάχθαι in four divisions, Ascl. Tact. 3.1.