concentrical
  (a.)同中心的
  Con·cen·tric Con·cen·tric·al, a.  Having a common center, as circles of different size, one within another.
     Concentric circles upon the surface of the water.   --Sir I. Newton.
     Concentrical rings like those of an onion.   --Arbuthnot.
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  concentrical
       adj : having a common center; "concentric rings" [syn: concentric,
              homocentric] [ant: eccentric]