a building made mainly of glass, artificially heated for growing plants; greenhouse
adjective
grown in a hothouse
needing very careful treatment; delicate
See hothouse in American Heritage Dictionary 4
noun
A heated greenhouse for plants that require an even, relatively warm temperature.
An environment conducive to vigorous growth or development; a hotbed: “With its mix of African, Latin, European, and pan-American influences, the Caribbean is truly a musical hothouse”(New Yorker).
adjective
Grown in a hothouse: a hothouse orchid.
Delicate and sensitive, as if from being grown in a hothouse.