Roseola \Ro*se"o*la\, n. [NL., dim. of L. rosa a rose.]

(med.) A rose-colored efflorescence upon the skin, occurring in circumscribed patches of little or no elevation and often alternately fading and reviving; also, an acute specific disease which is characterized by an eruption of this character; -- called also rose rash. -- Ro*se"o*lous, a.

Source: Webster's Revised Unabridged Dictionary (1913)