Definition from Wiktionary, the free dictionary
hotbed (plural hotbeds)
- a low bed of earth covered with glass, and heated with rotting manure; used for the germination of seeds and the growth of tender plants. A hotbed works as a miniature hothouse, i.e. greenhouse.
- (by extension) an environment that is ideal for the growth or development of something, especially of something undesirable
- An iron platform in a rolling mill, on which hot bars, rails, etc., are laid to cool.
low bed of earth covered with glass
place ideal for the growth of something undesirable
platform in rolling mill