1. fiftieth , (Plato Philosophus)

2. as Substantive, ἡ πεντηκοστή,

3. (i.e. μερίς); at Athens the duty of one-fiftieth , or two per century , on all exports and imports, (Isaeus Orator); εὕρηκε καινὴν ἱππικῆς τινὰ πεντηκοστήν he invented a new two per century duty , in lieu of his cavalry service, i. e. paid this instead of it, (Demosthenes Orator)

4. (i.e. ἡμέρα); the fiftieth day (after the Passover), Pentecost , (New Testament) (ML)

fiftieth; Pentecost