Strong's #2646: kataluma (pronounced kat-al'-oo-mah)
from 2647; properly, a dissolution (breaking up of a journey), i.e. (by implication) a lodging-place:-- guestchamber, inn.
Thayer's Greek Lexicon:
1) an inn, lodging place
2) an eating room, dining room
Part of Speech: noun neuter
Relation: from G2647
Citing in TDNT: 4:338, 543
This word is used 3 times:
Mark 14:14: "saith, Where is the guestchamber, where I shall eat the"
Luke 2:7: "room for them in the inn."
Luke 22:11: "Where is the guestchamber, where I shall eat the passover"