Concentric Definition

kən-sĕntrĭk
adjective
Having a center in common.
Concentric circles.
Webster's New World

(geometry) Having a common center.

Wiktionary
(physiology) (of a motion) In the direction of contraction of a muscle. (E.g. extension of the lower arm via the elbow joint while contracting the triceps and other elbow extensor muscles; closing of the jaw while flexing the masseter).
Antonym: eccentric. Concentric and eccentric movements are collectively referred to as isotonic (with motion), the antonym of which is isometric (without motion).
Wiktionary
Synonyms:
Antonyms:

Origin of Concentric

  • Middle English, from Middle French concentrique, from Medieval Latin concentricus, from Latin con- (“with, together”) + centrum (“circle, center”)

    From Wiktionary

  • Middle English concentrik from Medieval Latin concentricus Latin com- com- Latin centrum center center

    From American Heritage Dictionary of the English Language, 5th Edition

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