资料来源 : pyDict

同中心,集中,集中性

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Concentricity \Con`cen*tric"i*ty\, n.
   The state of being concentric.

资料来源 : WordNet®

concentricity
     n : the quality of having the same center (as circles inside one
         another) [ant: {eccentricity}]