τρῐᾱκάς, Ep. and Ion.
τρῐηκάς,άδος,ἡ, (τρεῖς, τρία)
A. the number thirty,
ἐς τριακάδας δέκα ναῶν
A. Pers. 339
.
II. the thirtieth day of the month.
Hes. Op. 766 , IG 12.845.2 , 7.2712.69 (Acraeph.), PCair.Zen. 150.8
(iii B. C.), Dsc. Eup. 1.146 , Hippiatr. 97 ;τ. ἡ πικρή(when school fees were due) Herod. 3.9 ; first used by Thales, acc. to D.L. 1.24 . At Athens theτριακάδεςwere dedicated to the memory of the dead, Harp. , Poll. 1.66 , etc.; offerings were made to Hecate, Ath. 7.325a , etc.; ἡ τῶν τ. ἀνιέρωσις
Tab.Defix. 99.12
; ἐπαρᾶσθαι ταῖς τριακάσιν
SIG 286.13
(Milet.,iv B. C.); of a festival in the cult of Zeus Panamaros, ib. 900.36
(iv A. D.).