[nim.bus] n, pl nim.bi or nim.bus.es [L, rainstorm, cloud; prob. akin to L nebula cloud--more at nebula] (1616) 1 a: a luminous vapor, cloud, or atmosphere about a god or goddess when on earth b: a cloud or atmosphere (as of romance) about a person or thing
2: an indication (as a circle) of radiant light or glory about the head of a drawn or sculptured divinity, saint, or sovereign 3 a: a rain cloud b: thunderhead; also: cumulus
2.