Hothouse

Part of speech: noun (n.)

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. [Obs.] Shak.

3. A brothel; a bagnio. [Obs.] B. Jonson.

4. A heated room for drying green ware.