opv opusculum • oquassa · · · Info · Definitions · Characters · · opv · · Text Latin · · Script 3 · · Length 1 · · Syllables Definitions · · · (noun) an oral vaccine (containing live but weakened poliovirus) that is given to provide immunity to poliomyelitis. Synonyms: Sabin vaccine, oral poliovirus vaccine, OPV, trivalent live oral poliomyelitis vaccine, TOPV. · · Noun Definition 1 Characters · · o latin small letter o U+006F p latin small letter p U+0070 v latin small letter v U+0076