Sentence:  The  term <WSD>‘Isolator'</WSD> as used in the Pharmaceutical Industry covers a variety of pieces of equipment. One group has the main objective of providing containment for the handling of dangerous materials   either aseptically or not. Another group has the main objective of providing a microbiologically controlled environment within which aseptic operations can be carried out. 
Meaning of the word marked with <WSD> tags:  A device that isolates something from the surrounding environment to keep it sterile.