[mass noun](Medicine)a rose-coloured rash occurring in measles, typhoid fever, syphilis, and some other diseases (医)蔷薇疹,玫瑰疹;风疹 ■(全称 roseola infantum ɪnˈfantəm)a disease of young children in which a fever is followed by a rash, caused by a herpesvirus 幼儿急疹,幼儿蔷薇疹,猝发疹
派生 roseolar adjective 语源
early 19th cent.: modern variant of rubeola, from Latin roseus 'rose-coloured'