Hothouse
Hothouse , noun
1.
A house kept warm to shelter tender plants and shrubs from the cold air; a place in which the plants of warmer climates may be reared, and fruits ripened.
2.
A bagnio, or bathing house. [Obsolete] — Shakespeare
3.
A brothel; a bagnio. [Obsolete] — B. Jonson
4.
(Pottery) A heated room for drying green ware.