Word Study
concentric
CIDE DICTIONARY
concentric, a. [F. concentrique. See Concenter.].
Having a common center, as circles of different size, one within another. [1913 Webster]
"Concentric circles upon the surface of the water." [1913 Webster]
"Concentrical rings like those of an onion." [1913 Webster]
concentric, n.
That which has a common center with something else. [1913 Webster]
"Its pecular relations to its concentrics." [1913 Webster]
OXFORD DICTIONARY
concentric, adj. (often foll. by with) (esp. of circles) having a common centre (cf. eccentric).
Derivative
concentrically adv. concentricity n.
Etymology
ME f. OF concentrique or med.L concentricus (as com-, centricus as centre)
ROGET THESAURUS
concentric
Centrality
N centrality, centricalness, center, middle, focus, core, kernel, nucleus, nucleolus, heart, pole axis, bull's eye, nave, navel, umbilicus, backbone, marrow, pith, vertebra, vertebral column, hotbed, concentration, centralization, symmetry, center of gravity, center of pressure, center of percussion, center of oscillation, center of buoyancy, metacenter, central, centrical, middle, azygous, axial, focal, umbilical, concentric, middlemost, rachidian, spinal, vertebral, middle, midst, centrally.For further exploring for "concentric" in Webster Dictionary Online
