τετράς

A. the number four, Arist. Metaph. 1081b16, 1090b23, Ph. 1.22, Plu. Lyc. 5, etc.

2. the fourth dav of the month, h.Merc. 19, Hes. Op. 794,798, Ar. Nu. 1131, Th. 5.54, IG 12.304.50,62, etc.; so Boeot. πετράς (q.v.); τετράδι γέγονας, prov. of one born to a life of labour (cf. τετραδισταί 11), Pl.Com. 100, cf. Aristonym. 4, Sannyr. 5.

b. the fourth day of the week, Wednesday, Cod.Just. 9.4.6.1.

3. a space of four days, Hp. Prog. 20.

4. the four quarters of the moon, Thphr. Sign. 5,27,38.

II. = τετραρχία 1, Hellanic. 52 J.

III. κατὰ τετράδα διατετάχθαι in four divisions, Ascl. Tact. 3.1.