Antechamber
Pronunciation : An"te*cham`ber
Part of Speech : n.
Etymology : [Cf. F. antichambre.]
Definition : 1. A chamber or apartment before the chief apartment and leading into it, in which persons wait for audience; an outer chamber. See Lobby.
2. A space viewed as the outer chamber or the entrance to an interior part. The mouth, the antechamber to the digestive canal. Todd & Bowman.
Source : Webster's Unabridged Dictionary, 1913