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concentric 

You will learn this in geometry.

Concentric means "sharing the same center". Con- = used multiple times, -Centric = center-related. (like cooperate: multiple people doing the same task)

So, it's like a dartboard or bullseye: the circles are all around the same point.

Something three-dimensional, like cylinders (water bottles, spray cans), may be coaxial.
The solar system is concentric. All the planets orbit the sun.

A properly set table has the bowls and plates concentric.
concentric by Solomon H July 16, 2008
Related Words

Concentraface 

The face you put on when concentrating
Whoa, Check out John Concentraface, he really has his tongue out
Concentraface by Canus Majoris August 8, 2016