[1] : The Collaborative International Dictionary of English v.0.48

roseola \rose"ola\, 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. -- rose"olous, a.
   1913 webster
see also:
rose rash rose"olous 

[2] : WordNet (r) 2.0

roseola
     n : any red eruption of the skin syn: rash, efflorescence,
         skin rash
see also:
rash efflorescence skin rash 

Roseola >> R Words
Roseola, definition of term: Roseola
roseola_pag1.html