From WordNet (r) 3.0 (2006): OPV n 1: an oral vaccine (containing live but weakened poliovirus) that is given to provide immunity to poliomyelitis [syn: Sabin vaccine, oral poliovirus vaccine, OPV, trivalent live oral poliomyelitis vaccine, TOPV]
OPV n 1: an oral vaccine (containing live but weakened poliovirus) that is given to provide immunity to poliomyelitis [syn: Sabin vaccine, oral poliovirus vaccine, OPV, trivalent live oral poliomyelitis vaccine, TOPV]
