Pathology . any of a group of diseases, usually intermittent or remittent, characterized by attacks of chills, fever, and sweating

formerly supposed to be due to swamp exhalations but now known to be caused by a parasitic protozoan, which is transferred to the human bloodstream by a mosquito of the genus Anopheles and which occupies and destroys red blood cells.

Archaic . unwholesome or poisonous air.

noun

ague , fever and ague , jungle fever , miasm , miasma , paludism , sickness