VARIABILITY
variability, variableness, variance
(noun) the quality of being subject to variation
unevenness, variability
(noun) the quality of being uneven and lacking uniformity
Source: WordNet® 3.1
Etymology
Noun
variability (countable and uncountable, plural variabilities)
The state or characteristic of being variable.
The degree to which a thing is variable. In data or statistics this is often a measurement of distance from the mean or a description of data range.
Synonyms
• variableness
Source: Wiktionary
Va`ri*a*bil"i*ty, n. Etym: [Cf. F. variabilité.]
1. The quality or state of being variable; variableness.
2. (Biol.)
Definition: The power possessed by living organisms, both animal and
vegetable, of adapting themselves to modifications or changes in
their environment, thus possibly giving rise to ultimate variation of
structure or function.
Source: Webster’s Unabridged Dictionary 1913 Edition