outlier

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outlier

[′au̇t‚lī·ər]
(geology)
A group of rocks separated from the main mass and surrounded by outcrops of older rocks.
(statistics)
In a set of data, a value so far removed from other values in the distribution that its presence cannot be attributed to the random combination of chance causes.

outlier

An entity outside the norm. Pronounced "out-liar," an outlier may refer to a person, organization or to data way outside the normal range.
References in periodicals archive ?
576 SD), outlying observations were rejected and the consensus means and SDs were recalculated.
Still, big outlying observations exist; particularly noticeable are again those associated with the Great Depression and the Second World War.
Sample criteria for testing outlying observations, Annals of Mathematical Statistics, 21, 27-58.