Definition of hothouses:
(n) :
A heated greenhouse.
(n) :
(figurative) An environment in which growth or development is encouraged naturally or artificially; a hotbed.
(v) :
(transitive) To provide (a child) with an enriched environment with the aim of stimulating academic development.
(n) :
An environment full of conflict or plots.
(n) :
(climatology) A hot state in global climate.
(n) :
A heated room for drying greenware.