nimbus
nim.bus \'nim-b*s\ \-.bi-, -.be-\ n or nim.bi or nim.bus.es [L, rainstorm, cloud; akin to Pahlavi namb mist] pl 1a: a luminous vapor, cloud, or atmosphere about a god or goddess when on e arth 1b: 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 3a: the rain cloud that is of uniform grayness and extends over the entire sky 3b: a cloud from which rain is falling
Webster's English Dictionary