Basement
Basement (bāsment) , noun
[French soubassement. Of uncertain origin. Compare Base, a., Bastion.]
(Architecture) The outer wall of the ground story of a building, or of a part of that story, when treated as a distinct substructure. (See Base, n., 3 (a).) Hence: The rooms of a ground floor, collectively.
Collocations (1)
Basement membrane (Anatomy) , a delicate membrane composed of a single layer of flat cells, forming the substratum upon which, in many organs, the epithelioid cells are disposed.