CONCENTRIC

Concentric

Concentric objects share the same center, axis or origin. Circles, tubes, cylindrical shafts, disks, and spheres may be concentric to one another. Notice that two objects can have equal radii and be concentric and different. For example, two different meridians of a terrestrial globe are concentric and congruent, their common center is a point that represents the earth center.

The above text is a snippet from Wikipedia: Concentric
and as such is available under the Creative Commons Attribution/Share-Alike License.

concentric

Adjective

  1. Having a common center.
  2. (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).


The above text is a snippet from Wiktionary: concentric
and as such is available under the Creative Commons Attribution/Share-Alike License.

Need help with a clue?
Try your search in the crossword dictionary!