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a severe form in which the eruption is dark in color due to effusion of blood into affected areas of the skin.
Synonym(s): black measles (1)
n. (used with a sing. or pl. verb)
A severe form of measles characterized by dark, hemorrhagic skin eruptions. Also called hemorrhagic measles.
Etymology: AS, blac + OHG, masala
an acute tick-borne illness caused by the bacterium Rickettsia rickettsii. The disease is characterized by a sudden onset of headache, chills, and fever, which can persist for 2 to 3 weeks. A characteristic rash appears on the extremities and trunk about the fourth day of illness. Also called hemorrhagic measles.