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deviating from the recognized or customary character, practice, etc.; irregular; erratic; peculiar; odd: eccentric conduct; an eccentric person. 2. Geometry. not having the same center; not concentric: used especially of two circles or spheres at least one of which contains the centers of both. 3. (of an axis, axle, etc.) not situated in the center.
Eccentric and Concentric are two words that are often confused in terms of their meanings and connotations. The two words are related to the contractions of the muscle.They are both types of isotonic contraction. When the muscle shortens to move a load then the muscle undergoes concentric contraction. bicep curl is one of the best examples of a concentric contraction. While holding a weight too, a man has to bend his elbow thereby, resulting in what is called concentric contraction. In other words, concentric contraction is all about muscular movement.