An Etymological Dictionary of Astronomy and Astrophysics
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Of a distribution function, a skewness in which the left tail (tail at small end of the distribution) is more pronounced that the right tail (tail at the large end of the distribution). → positive skewness.

→ negative; → skewness.

Of a distribution function, a skewness in which the right tail (tail at the large end of the distribution) is more pronounced than the left tail (tail at small end of the distribution). → negative skewness.

→ positive; → skewness.

A measure of the degree of asymmetry of a distribution. If the left tail (tail at small end of the distribution) is more pronounced that the right tail (tail at the large end of the distribution), the function is said to have → negative skewness. If the reverse is true, it has → positive skewness. If the two are equal, it has → zero skewness.

Noun from → skew + → -ness.