NIMBUS
aura, aureole, halo, nimbus, glory, gloriole
(noun) an indication of radiant light drawn around the head of a saint
nimbus, nimbus cloud, rain cloud
(noun) a dark grey cloud bearing rain
Source: WordNet® 3.1
Etymology
Noun
nimbus (plural nimbi or nimbuses)
A circle of light; a halo.
A gray rain cloud.
Usage notes
• (circle of light): In heraldry and art, a nimbus may be considered distinct from a halo. The term halo can refer to an open ring of light or of gold behind the head of a saint, while nimbus refers to a solid disk of light or gold.
Synonyms
• (circle of light): halo
Source: Wiktionary
Nim"bus, n.; pl. L. Nimbi, E. Nimbuses. Etym: [L., a rain storm, a
rain cloud, the cloudshaped which enveloped the gods when they
appeared on earth.]
1. (Fine Arts)
Definition: A circle, or disk, or any indication of radiant light around
the heads of divinities, saints, and sovereigns, upon medals,
pictures, etc.; a halo. See Aureola, and Glory, n., 5.
Note: "The nimbus is of pagan origin." "As an atribute of power, the
nimbus is often seen attached to the heads of evil spirits."
Fairholl.
2. (Meteor.)
Definition: A rain cloud; one of the four principal varieties of clouds.
See Cloud.
Source: Webster’s Unabridged Dictionary 1913 Edition