con·cen·tric

[kuhn-sen-trik]
adjective
having a common center, as circles or spheres.
Also, con·cen·tri·cal.


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

con·cen·tri·cal·ly, adverb
con·cen·tric·i·ty [kon-suhn-tris-i-tee, -sen-] , noun
non·con·cen·tric, adjective
non·con·cen·tri·cal, adjective
non·con·cen·tri·cal·ly, adverb
non·con·cen·tric·i·ty, noun
un·con·cen·tric, adjective
un·con·cen·tri·cal·ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Concentric is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Collins
World English Dictionary
concentric (kənˈsɛntrɪk) [Click for IPA pronunciation guide]
 
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
Arrange the apple quarters, tightly packed, in concentric circles on sugar
  mixture.
Thus, the mantle is itself divided into concentric layers, with different
  minerals predominating at different depths.
One feature is novel for city maps: concentric circles that represent an
  approximate walking time.
Bands of color in concentric circles are also a popular design.
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