FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

pentekoste πεντηκοστή — pen-tay-kos-tay' — feminine of the ordinal of 4004; fiftieth (2250 being implied) from Passover, i.e. the festival of "Pentecost":--Pentecost.

see GREEK for 4004

see GREEK for 2250