(eg-zan′thĕm)

(eg″zan″thē′mă)
pl. exanthemas pl. -mata pl. exanthems [Gr. exanthema, eruption]
Any eruption or rash that appears on the skin, as opposed to one that appears on the mucous membranes (enanthem). The term is often used to describe childhood or infectious rashes, e.g., measles or scarlet fever, but it also applies to other rashes.
exanthematous (eg″zan″thĕm′ăt-ŭs), adj.

exanthem subitum

SEE: Roseola.