Longman Dictionary of Contemporary English
operating theatre
noun
EXAMPLES FROM CORPUS
▪ At the hospital, a surgeon was called and the boy was taken immediately into the operating theatre.
▪ From the small gallery above the operating theatre the whole process was obscure, if sickeningly bloody, to the watching Cowley.
▪ His shaping room had the brightly lit intensity of an operating theatre, the mystery of a chemical laboratory.
▪ Once again she was aware of the sounds in the operating theatre.
▪ Spiralling leg fractures, cysts, ventricle failure also saw her whisked into the operating theatre.
▪ The powerful surgeon in the operating theatre is powerless sitting in the dentists chair.
▪ You closed the door like a surgeon entering the operating theatre.
Wiktionary
operating theatre
alt. A room in a hospital used for performing surgery (originally designed for operations in front of observers). n. A room in a hospital used for performing surgery (originally designed for operations in front of observers).
WordNet
operating theatre
n. a room in a hospital equipped for the performance of surgical operations; "great care is taken to keep the operating rooms aseptic" [syn: operating room, OR, operating theater, surgery]