noun
A structure with transparent walls and roof, used for cultivating plants that need controlled climatic conditions.
このグリーンハウスでは一年中トマトを栽培しています。
We grow tomatoes all year round in this greenhouse.
温室 is the native Japanese word for greenhouse, more common in formal or technical contexts. グリーンハウス is a loanword often used in casual or commercial settings.
Borrowed from English 'greenhouse'.