Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

222. Centrality — N. centrality, centricalness†, center; middle &c 68;

focus &c 74. core, kernel; nucleus, nucleolus; heart, pole axis, bull's eye; nave, navel; umbilicus, backbone, marrow, pith; vertebra, vertebral column; hotbed; concentration &c (convergence) 290; centralization; symmetry. center of gravity, center of pressure, center of percussion, center of oscillation, center of buoyancy &c; metacenter†. V. be central &c adj.; converge &c 290. render central, centralize, concentrate; bring to a focus. Adj. central, centrical†; middle &c 68; azygous, axial, focal, umbilical, concentric; middlemost; rachidian†; spinal, vertebral. Adv. middle; midst; centrally &c adj..