concentric

[kuhn-sen-trik]
adjective
having a common center, as circles or spheres.
Also, concentrical.


Origin:
1350–1400; Middle English consentrik < Medieval Latin concentricus. See con-, center, -ic

concentrically, adverb
concentricity [kon-suhn-tris-i-tee, -sen-] , noun
nonconcentric, adjective
nonconcentrical, adjective
nonconcentrically, adverb
nonconcentricity, noun
unconcentric, adjective
unconcentrically, adverb
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World English Dictionary
concentric (kənˈsɛntrɪk)
 
adj
Compare eccentric having a common centre: concentric circles
 
[C14: from Medieval Latin concentricus, from Latin com- same + centrumcentre]
 
con'centrically
 
adv
 
concentricity
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

concentric
1390s, from O.Fr. concentrique, from M.L. concentricus, from com- "together" + centrum "circle, center" (see center).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

concentric con·cen·tric (kən-sěn'trĭk)
adj.
Having a common center or center point, as of circles.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Bands of color in concentric circles are also a popular design.
Think of these four as concentric circles inching ever closer to the core
  activity of college fund raising.
Beyond this immediate dilemma, other doubts ripple out in concentric rings.
Thus, the mantle is itself divided into concentric layers, with different
  minerals predominating at different depths.
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