Wiktionary
clean room
n. (alternative form of cleanroom English)
WordNet
clean room
n. a room that is virtually free of dust or bacteria; used in laboratory work and in assembly or repair of precision equipment [syn: white room]
Usage examples of "clean room".
The rest of the place is crammed with machine tools, surplus aerospace materials, his vehicles, and his clean room, where he doesn't build racing cars.
They took me to a warm, clean room and ordered me to strip, which I did.