against or in the opposite direction of contraction of a muscle. (E.g. 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)
Antonym: concentric. Both concentric and eccentric are collectively referred to as isotonic, the antonym of which is isometric.
A disk or wheel so arranged upon a shaft that the center of the wheel and that of the shaft do not coincide
a person of a specified kind (usually with many eccentricities); "a real character"; "a strange character"; "a friendly eccentric"; "the capable type"; "a mental case"
A speleothem of abnormal shape or attitude cf Helictite Cave - Depositional Features Ref JJ
In the Ptolemaic system, the supposed circular orbit of a planet about the earth, but with the earth not in its center
character: a person of a specified kind (usually with many eccentricities); "a real character"; "a strange character"; "a friendly eccentric"; "the capable type"; "a mental case"