plane of symmetry
61Axes of coordinates in a plane — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …
62bilateral symmetry — noun the property of being symmetrical about a vertical plane • Syn: ↑bilaterality, ↑bilateralism • Derivationally related forms: ↑bilateral (for: ↑bilaterality) • Hypernyms: ↑ …
63glide plane — Crystall. a symmetry element of a space group such that a reflection of the lattice with respect to the plane and a translation of the lattice parallel to the plane bring the lattice back to its original position. [1890 95] * * * …
64bilateral symmetry — noun Date: 1860 symmetry in which similar anatomical parts are arranged on opposite sides of a median axis so that only one plane can divide the individual into essentially identical halves …
65biradial symmetry — A type of symmetry in which an organism consists of radially arranged parts, equally arranged on each side of a median longitudinal plane …
66radial symmetry — Biol. a basic body plan in which the organism can be divided into similar halves by passing a plane at any angle along a central axis, characteristic of sessile and bottom dwelling animals, as the sea anemone and starfish. Cf. bilateral symmetry …
67mirror symmetry — noun symmetry about a plane, like that between an object and its reflection …
68radial symmetry — ra′dial sym′metry n. dvl bio a basic body plan in which the organism can be divided into similar halves by passing a plane at any angle along a central axis Compare bilateral symmetry • Etymology: 1885–90 …
69bilateral symmetry — noun a) the property of being symmetrical about a vertical plane b) the characteristic, in animals, of being symmetric about a plane running from head to tail …
70bilateral symmetry — noun the property of being divisible into symmetrical halves on either side of a unique plane …
