LIGHTNING n.
The act of making bright, or the state of being made bright; enlightenment; brightening, as of the mental powers. [R.] Ball lightning, a rare form of lightning sometimes seen as a globe of fire moving from the clouds to the earth. -- Chain lightning, lightning in angular, zigzag, or forked flashes. -- Heat lightning,…
LUMINOUS a.
Enlightened; intelligent; also, clear; intelligible; as, a luminous mind. " Luminous eloquence." Macaulay. " A luminous statement." Brougham. Luminous paint, a paint made up with some phosphorescent substance, as sulphide of calcium, which after exposure to a strong light is luminous in the dark for a time.…