ab·er·ra·tion / ˌabəˈrāshən/ • n. a departure from what is normal, usual, or expected, typically one that is unwelcome. ∎ a person whose beliefs or behavior are unusual or unacceptable. ∎ a departure from someone's usual moral character or mental ability, typically for the worse. ∎ Biol. a characteristic that deviates from the normal type: color aberrations. ∎ Optics the failure of rays to converge at one focus because of limitations or defects in a lens or mirror. ∎ Astron. the apparent displacement of a celestial object from its true position, caused by the relative motion of the observer and the object.DERIVATIVES: ab·er·ra·tion·al / -shənl/ adj.
Aberration ★ 1997 (R)
Amy (Gidley) has traveled to her parents remote cabin and notices a lizard infestation. So she heads to the store for some exterminating equipment and meets biologist Marshall (Bossell), who studies eco-abnormalities. Seems the lizards are vicious mutants who eat Amy's cat and are working their way up the food chain. Doesn't offer many scares. 93m/C VHS . AU GB Pamela Gidley, Simon Bossell, Valery (Valeri Nikolayev) Nikolaev; D: Tim Boxell; W: Darrin Oura, Scott Lew; C: Allen Guilford. VIDEO
1. deviation from the normal.
2. a defect in the image formed by a lens. chromatic a. a defect in which the image has coloured fringes as a result of the different extent to which light of different colours is refracted. spherical a. a defect in which the image is blurred because curvature of the lens causes light rays from the object to come to a focus in slightly different positions.
Spherical aberration occurs when rays falling on the periphery of a lens or mirror are not brought to the same focus as light at the centre; the image is blurred. Chromatic aberration occurs when the wavelengths of dispersed light are not brought to the same focus; the image is falsely coloured.