Definition of "eccentric"
eccentric
/ɪkˈsɛntɹɪk/
adjective
comparative more eccentric, superlative most eccentric
(of a person) Deviating from the norm; behaving unexpectedly or differently; unconventional and slightly strange.
(physiology, of a motion) Against or in the opposite direction of contraction of a muscle (such as results from flexion of the lower arm (bending of the elbow joint) by an external force while contracting the triceps and other elbow extensor muscles to control that movement; opening of the jaw while flexing the masseter).
noun
plural eccentrics