the type of dense clouds or cloud mass with ragged edges, that yields rain or snow; a rain cloud.
(initial capital letter) U.S. Aerospace. one of a series of polar-orbiting meteorological and environmental research satellites, the last of which Nimbus 7, launched 1978, was the first satellite designed to monitor atmospheric pollutants.
Origin of nimbus
1610-20; < Latin: a rainstorm, rain cloud, thundercloud, cloud; akin to Latinnebula and Greeknephélē, néphos cloud
1610s, "bright cloud surrounding a god," from Latin nimbus "cloud," perhaps related to nebula "cloud, mist" (see nebula). Meaning "halo" is first recorded c.1730. Meteorological sense of "a rain cloud" is from 1803.