coma aberration

co·ma ab·er·ra·tion

1. the distortion of image formation created when a bundle of light rays enters an optical system not parallel to the optic axis. 2. in botany, any tuft, as the hairs on a seed, or the greenery on a radish or a pineapple. Synonym(s): coma (3) [G. komē, hair, foliage]

co·ma ab·er·ra·tion

(kō'mă ab-ĕr-ā'shŭn) The distortion of image formation created when a bundle of light rays enters an optic system not parallel to the optic axis.
Synonym(s): coma (3) .
[G. komē, hair, foliage]