noun, noun which may take the genitive case particle 'no'
concentricity
Technical term for having the same center, used in geometry and design.
This figure is composed of concentric circles.
Edo-period constable; policeman (historical)
Historical term for a low-ranking police official in the Edo period, subordinate to a 与力.
See also: 与力
In the Edo period, constables patrolled the town.
concentric circles
working together with one mind; united in purpose
unity of mind; acting in perfect harmony
From Middle Chinese 同心 (duŋ sim, 'same heart/mind'). The kanji 同 (same) and 心 (heart/mind) transparently reflect the meanings of shared purpose and concentricity.