Skewness

noun

1. The character or state of being skew. Specifically: In biometry: The property of exhibiting skew variation. See variation.
2. The numerical expression of skew variation; asymmetry, measured by the ratio a = D/σ, where D is the distance (mean, mode) and σ is the index of variability.
3. In mathematics, the degree of disturbance of symmetry in a curve.
4. The property of being skew.
5. A measure of the asymmetry of the probability distribution of a real-valued random variable; is the third standardized moment, defined as where is the third moment about the mean and is the standard deviation.