Greenhouse vs. Polytunnel

Greenhousenoun

A building used to grow plants, particularly one with large glass windows or plastic sheeting to trap heat from sunlight even in intemperate seasons or climates.

Greenhousenoun

The glass of a plane's cockpit.

Greenhouseverb

(transitive) To place (plants) in a greenhouse.

Greenhousenoun

A house in which tender plants are cultivated and sheltered from the weather.

Greenhousenoun

a building with glass walls and roof; for the cultivation and exhibition of plants under controlled conditions

Greenhouseadjective

of or relating to or caused by the greenhouse effect;

Greenhousenoun

a glass building in which plants that need protection from cold weather are grown.

Greenhouse

A greenhouse (also called a glasshouse, or, if with sufficient heating, a hothouse) is a structure with walls and roof made chiefly of transparent material, such as glass, in which plants requiring regulated climatic conditions are grown. These structures range in size from small sheds to industrial-sized buildings.

Polytunnelnoun

A tunnel made of polyethylene, used to grow plants that require a higher temperature and/or humidity than that which is available in the environment.

Polytunnel

A polytunnel (also known as a polyhouse, hoop greenhouse or hoophouse, grow tunnel or high tunnel) is a tunnel typically made from steel and covered in polyethylene, usually semi-circular, square or elongated in shape. The interior heats up because incoming solar radiation from the sun warms plants, soil, and other things inside the building faster than heat can escape the structure.