ROSEOLA Meaning of ROSEOLA in English n. 1 a rosy rash in measles and similar diseases. 2 a mild febrile disease of infants. roseolar adj. roseolous adj.[ mod. var. of RUBEOLA f. L roseus rose-coloured ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012