aberration
//ˌæb.əˈreɪ.ʃən//
Noun
aberrationSingular
aberrationsPlural
1
A departure from what is normal, usual, or expected, typically an unwelcome one.
His rude behavior at the meeting was an aberration; he is usually very polite.
2
A characteristic that deviates from the normal type; an anomaly or irregularity.
The scientist noted an aberration in the data that required further investigation.
3
In optics, the failure of rays to converge at one focus because of limitations or defects in a lens or mirror.
The photographer noticed chromatic aberration at the edges of the image due to the cheap lens.
4
In biology, a deviation from the normal structure or number of chromosomes.
The geneticist identified a chromosomal aberration in the patient's DNA sample.