concentric

 
Pronunciation: /kənˈsɛntrɪk/

adjective

  • of or denoting circles, arcs, or other shapes which share the same centre, the larger often completely surrounding the smaller: concentric circles indicate distances of 1 km, 2 km, and 3 km from the centre a universe consisting of concentric spheres or layers the revolving circle is concentric with the fixed outer circle

Derivatives

concentrically

adverb

concentricity

Pronunciation: /kɒnsɛnˈtrɪsɪti/
noun

Origin:

late Middle English: from Old French concentrique or medieval Latin concentricus, from con- 'together' + centrum 'centre'