ABERRANCY
aberrance, aberrancy, aberration, deviance
(noun) a state or condition markedly different from the norm
Source: WordNet® 3.1
Etymology
Noun
aberrancy (countable and uncountable, plural aberrancies)
The condition of being aberrant; an aberrance. [from 17th c.]
(geometry) The deviation of a curve from circular form.
Source: Wiktionary
Ab*er"rance, Ab*er"ran*cy, n.
Definition: State of being aberrant; a wandering from the right way;
deviation from truth, rectitude, etc. Aberrancy of curvature (Geom.),
the deviation of a curve from a circular form.
Source: Webster’s Unabridged Dictionary 1913 Edition