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| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| chromatic aberration | |
| —n | |
| a defect in a lens system in which different wavelengths of light are focused at different distances because they are refracted through different angles. It produces a blurred image with coloured fringes | |
chromatic aberration n.
Color distortion in an image produced by a lens, caused by the inability of the lens to bring the various colors of light to focus at a single point. Also called chromatism.
| chromatic aberration
See under aberration. |