(optics) An optical aberration in which an image has coloured fringes, caused by differential refraction of light of different wavelengths.

(optics) A type of lens aberration which causes blurriness, particularly away from the centre of the lens.

plural of planetary aberration

plural of annual aberration

(astronomy) A deviation due to the Earth's orbital motion.

plural of diurnal aberration

(astronomy) A deviation of where a planet appears to be, due to the motion of the planet during the time that the light reaches the Earth.

(astronomy) A deviation due to the earth's axial rotation.

plural of spherical aberration

(astronomy) A phenomenon that produces an apparent motion of celestial objects about their true positions, dependent on the velocity of the observer.