A surgical mask is used inside the operating room or during other sterile procedure areas to protect the patient environment from contamination. Surgical masks have ties so that they can be adjusted for fit, and are tied over the top of a surgical or bouffant cap.
rockfall. 1  an act or instance of the falling of rock, as in a cave-in or an avalanche. 2  a mass of rocks that have fallen: to be trapped under a rockfall.
Befall is an old-fashioned or literary way of saying something happened by chance. Bad luck befalls a heroine who drops her lucky rabbit foot. When something befalls you, itâs like bad luck falling on you. An earthquake can befall a city. A terrible disease could befall a child. A bolt of lightning could befall a very unlucky person. When something befalls you, youâre in trouble. Tragedies befall families in many of Shakespeareâs plays â thatâs what makes them so much fun.