a. Commensurable; symmetrical. [ Obs. ] Dr. H. More. [ 1913 Webster ]
n. One eminently studious of symmetry of parts. [ R. ] Sir P. Sidney. [ 1913 Webster ]
a. Symmetrical. [ 1913 Webster ]
a. [ Cf. F. symétrique. See Symmetry. ]
☞ A curve or a plane figure is symmetrical with respect to a given line, and a line, surface, or solid with respect to a plane, when for each point on one side of the line or plane there is a corresponding point on the other side, so situated that the line joining the two corresponding points is perpendicular to the line or plane and is bisected by it. Two solids are symmetrical when they are so situated with respect to an intervening plane that the several points of their surfaces thus correspond to each other in position and distance. In analysis, an expression is symmetrical with respect to several letters when any two of them may change places without affecting the expression; as, the expression
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n. Same as Symmetrian. [ R. ] Holinshed. [ 1913 Webster ]
n. One eminently studious of symmetry of parts. Sir H. Wotton. [ 1913 Webster ]
v. t.
n. [ L. symmetria, Gr. &unr_;;
☞ Bilateral symmetry, or two-sidedness, in vertebrates, etc., is that in which the body can be divided into symmetrical halves by a vertical plane passing through the middle; radial symmetry, as in echinoderms, is that in which the individual parts are arranged symmetrically around a central axis; serial symmetry, or zonal symmetry, as in earthworms, is that in which the segments or metameres of the body are disposed in a zonal manner one after the other in a longitudinal axis. This last is sometimes called metamerism. [ 1913 Webster ]
Axis of symmetry. (Geom.)
Respective symmetry,