Dictionary entry

πεντηκοστός

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

πεντηκοστός, -ή, -όν,

[in LXX for חֲמִשִּׁים, Le 25:10, 11, IV Ki 15:23, 27; I Mac4, II Mac 14:4; ἡ π., To 2:1, II Mac 12:32*;]

fiftieth. As subst., ἡ π.;

(a) (sc. μερίς), at Athens, a tax of two per cent.;

(b) (sc. ἡμέρα, i.e. the fiftieth day after the Passover), Pentecost, the second of the three great Jewish feasts (To 2:1, II Mac 12:32; ἑορτὴ ἑβδομάδων, De 16:10, al.): Ac 2:120:16, I Co 16:8.†