In geometry, two or more objects are said to be concentric, coaxal, or coaxial when they share the same center or axis. Circles, regular polygons and regular polyhedra, and spheres may be concentric to one another, as may cylinders.

What is the meaning of concentric in science?

The definition of concentric is two or more things with a common center. An example of concentric are the circles of the iris and pupil within an eye. ... (geometry) Having a common center. adjective. (physiology) (of a motion) In the direction of contraction of a muscle.

What is the meaning of a concentric circle?

Concentric circles are circles with a common center. The region between two concentric circles of different radii is called an annulus.