noun. A heated greenhouse for plants that require an even, relatively warm temperature.

noun. An environment conducive to vigorous growth or development; a hotbed.

adjective. Grown in a hothouse.

adjective. Delicate and sensitive, as if from being grown in a hothouse.

transitive verb. To cultivate in a hothouse.

noun. A house in which to sweat and cup the body; a bath-house.

noun. A brothel.

noun. A structure kept artificially heated for the growth of tender exotic plants, or subtropical plants, or for the production of native fruits, flowers, etc., out of season.

noun. In manufacturing, any heated chamber or building; a drying-room; specifically, the warmest drying-room in which green pottery is dried before going to the kiln.

noun. 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.

noun. A bagnio, or bathing house.

noun. A brothel; a bagnio.

noun. A heated room for drying green ware.

noun. A heated greenhouse.

noun. An environment in which growth or development is encouraged; a hotbed.

noun. A bagnio, or bathing house; a brothel.

noun. A heated room for drying greenware.

verb. To provide with an enriched environment with the aim of stimulating academic development.

noun. a greenhouse in which plants are arranged in a pleasing manner

"The atmosphere was purified in a vast "hothouse" - a large, circular room buried just below the lunar surface."