An operating theater (also known as an operating room (OR), operating suite, or operation suite) is a facility  within Baby Hospital where surgical operations are carried out in an aseptic environment.

 

Historically, the term "operating theatre" referred to a non-sterile, tiered theater or amphitheater in which students and other spectators could watch surgeons perform surgery. Contemporary operating rooms are devoid of a theatre setting, making the term "operating theater" a misnomer.