roseolous en · ADJ
Etymology
From roseola + -ous.
Meanings
-
(not-comparable) Of or pertaining to a roseola.
It is certain, however, some erythematous or roseolous rashes do closely resemble scarlet fever, and, as they are attended not infrequently with some constitutional disturbance and fever, the difficulty in diagnosis may be very great.
1893, Henry Ashby, The Diseases of Children: Medical and Surgical: