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Aberration

Aberration (Latin ab, from or away + errare, to wander), a deviation or wandering, especially used in the figurative sense as:

In ethics, a deviation from the truth.
In pathology, a mental derangement.
In zoology and botany, abnormal development or structure.
In optics, the word has two special applications:

4.1 Aberration of light,

4.2 Aberration in optical systems, see also the article on lenses

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