concentric
adjective /kənˈsentrɪk/
  /kənˈsentrɪk/
 (geometry)- (of circles) having the same centre enlarge image enlarge image- concentric rings
- The revolving circle is concentric with the fixed outer circle.
 Oxford Collocations DictionaryConcentric is used with these nouns:- circle
- ring
 Word Originlate Middle English: from Old French concentrique or medieval Latin concentricus, from con- ‘together’ + centrum ‘centre’.
