Aberrations

n. deviation, irregularity, abnormality

Aberration has several meanings:An abnormality of chromosomesA disorder in one's mental state (see Mental illness)In optics:Optical aberration, an imperfection in image formation by an optical systemSpherical aberration, which occurs when light rays strike a lens or mirror near its edgeChromatic aberration, caused by differences in refractive index for different wavelengths of lightDefocus aberration, which occurs when a system is out of focus
See more at Wikipedia.org...

Noun
1. a state or condition markedly different from the norm
(synonym) aberrance, aberrancy, deviance
(hypernym) abnormality, abnormalcy, abnormal condition
(hyponym) chromosomal aberration, chromosomal anomaly, chrosomal abnormality, chromosonal disorder
(derivation) aberrate
2. a disorder in one's mental state
(hypernym) mental disorder, mental disturbance, disturbance, psychological disorder, folie
(derivation) aberrate
3. an optical phenomenon resulting from the failure of a lens or mirror to produce a good image
(synonym) distortion, optical aberration
(hypernym) optical phenomenon
(hyponym) chromatic aberration
(derivation) aberrate

n. aberration, deviation, irregularity, abnormality, kink, small tight curl, twist; stiffness, pain, cramp (in a muscle); glitch, flaw, imperfection; peculiarity

failure of a mirror or lens to produce an exact point-to-point correspondence between an object and an image of the object.