Eccentric

1. Not at or in the centre; away from the centre.
2. Not perfectly circular; elliptical.
3. Having a different center; not concentric.
4. (of a person) Deviating from the norm; behaving unexpectedly or differently.
5. (physiology, of a motion) Against or in the opposite direction of contraction of a muscle (e.g., 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).
6. Having different goals or motives.

Usage notes

• (physiology, of motion): Motions that are eccentric or the opposite (concentric) are classified as isotonic (“having equal tension”), the antonym of which is isometric(“retaining equal length”).

Synonyms

• (not at or in the centre): eccentrical, excentrical
• (not perfectly circular): eccentrical, excentrical
• (having a different centre): eccentrical, excentrical
• (deviating from the norm): eccentrical, excentrical, odd, abnormal
• (against the contraction of a muscle):
• (having different goals or motives):eccentrical, excentrical

AntonymsEdit

• (against the contraction of a muscle):concentric