Below are possible answers for the crossword clue Quirk.
12 letter answer(s) to quirk
ECCENTRICITY
(geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis; "a circle is an ellipse with zero eccentricity"
a circularity that has a different center or deviates from a circular path
strange and unconventional behavior
IDIOSYNCRASY
a behavioral attribute that is distinctive and peculiar to an individual
3 letter answer(s) to quirk
TIC
a local and habitual twitching especially in the face
Muscle spasms
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