Strong's G5152 — τρίστεγον (noun)
tristegon (tris'-teg-on) n.
1. a third roof (story)
[neuter of a compound of G5140 and G4721 as noun]
KJV: third loft 
Root(s): G5140, G4721 
Hebrew root: στέγη
Occurrences: 1