epidemic hysertia epidemic encephalitis • epidemicity · · · Info · Definitions · Synonyms · Characters · · epidemic hysertia · · Text Common · · Latin · · Scripts 17 · · Length 8 · · Syllables Definitions · · · (noun) a condition in which a large group of people exhibit the same state of violent mental agitation. Synonyms: mass hysteria, epidemic hysertia. · · Noun Definition 1 Synonyms · · · mass hysteria · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 y latin small letter y U+0079