Strong's G4003 — πεντεκαιδέκατος (adjective)
pentekaidekatos (pen-te-kai-de'-kat-os) adj.
1. five and tenth
[from G4002 and G2532 and G1182]
KJV: fifteenth 
Root(s): G4002, G2532, G1182 
Hebrew root: καί
Occurrences: 1