Thesaurus

(abbrev) : group specific antigens

(n) : a device to restrain speech, usually a rag in the mouth and secured there with tape, another rag that has been folded into a narrow strip, or a rubber ball threaded onto a cord or a leather or rubber strap; an order or rule forbidding discussion of a case or subject. Also called a gag order

(v) : to have the vomiting reflex triggered; to restrain someone's speech