τετρώβολ-ος · tetrōbol-os — LSJ
of four obols
of four obols, τόκος IG 12(5).860.29 (Tenos).
II four-obol piece, soldierʼs
as Subst. τετρώβολον, τό, four-obol piece, τετρωβόλου τοῦτʼ ἔστιν (as Kuster for τετρώβολον) Ar. Pax 254, cf. Plb. 34.8.8, SIG 982.15 (Pergam., ii B.C.), etc.; it was a soldierʼs daily pay, hence τετρωβόλου βίος a soldierʼs life, Paus.Gr. Fr. 307; so in masc. -ώβολος, of a common soldier, Men. Pk. 203.
2 weight of four obols
τετρώβολον, τό, weight of four obols, Dsc. 4.159, Gal. 12.628, etc.