A contagious viral febrile disorder commencing with catarrhal symptoms, and marked by the appearance on the third day of an eruption of distinct red circular spots, which coalesce in a crescentic form, are slightly raised above the surface, and after the fourth day of the eruption gradually decline; rubeola. It is a common childhood disease.
(Med.)
“Measles commences with the ordinary symptoms of fever.”
— Am. Cyc.