Strong’s Greek
G5152 — tristegon
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
τρίστεγον
tristegon — pronounced tris'-teg-on
neuter of a compound of 5140 and 4721 as noun; a third roof (story):--third loft. see GREEK for 5140 see GREEK for 4721
1 occurrence in the KJV.
Acts 20:9
And there sat in a window a certain young man named Eutychus, being fallen into a deep sleep: and as Paul was long preaching, he sunk down with sleep, and fell down from the third loft, and was taken up dead.