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hemihedral form

См. также в других словарях:

  • hemihedral — adj. Crystallog. having half the number of planes required for symmetry of the holohedral form …   Useful english dictionary

  • pyritohedron — drən sometimes ˌdrän noun (plural pyritohedrons or pyritohedra) Etymology: New Latin, from pyrito (from International Scientific Vocabulary …   Useful english dictionary

  • Deltohedron — Del to*he dron, n. [Gr. de lta, the letter [Delta] + e dra seat, base.] (Crystallog.) A solid bounded by twelve quadrilateral faces. It is a hemihedral form of the isometric system, allied to the tetrahedron. [1913 Webster] …   The Collaborative International Dictionary of English

  • diploid — dip loid (d[i^]p loid), n. [Gr. diplo os twofold + oid.] 1. (Crystallog.) A solid bounded by twenty four similar quadrilateral faces. It is a hemihedral form of the hexoctahedron. [1913 Webster] 2. (Biol.) a cell or organism having a number of… …   The Collaborative International Dictionary of English

  • Pyritohedral — Pyr i*to*he dral, a. [See {Pyritohedron}.] (Crystallog.) Like pyrites in hemihedral form. [1913 Webster] …   The Collaborative International Dictionary of English

  • Regular tetrahedron — Tetrahedron Tet ra*he dron, n. [Tetra + Gr. ? seat, base, fr. ? to sit.] (Geom.) A solid figure inclosed or bounded by four triangles. [1913 Webster] Note: In crystallography, the regular tetrahedron is regarded as the hemihedral form of the… …   The Collaborative International Dictionary of English

  • Sphenoid — Sphe noid, n. 1. (Crystallog.) A wedge shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid. [1913 Webster] 2. (Anat.) The sphenoid bone. [1913 Webster] …   The Collaborative International Dictionary of English

  • Tetrahedron — Tet ra*he dron, n. [Tetra + Gr. ? seat, base, fr. ? to sit.] (Geom.) A solid figure inclosed or bounded by four triangles. [1913 Webster] Note: In crystallography, the regular tetrahedron is regarded as the hemihedral form of the regular… …   The Collaborative International Dictionary of English

  • hemihedron — ˈhēdrən noun (plural hemihedrons or hemihedra) Etymology: New Latin, from hemi (I) + hedron : a hemihedral form or crystal …   Useful english dictionary

  • hemiholohedral — | ̷ ̷ ̷ ̷ at hemi + adjective Etymology: hemi (I) + holohedral of a crystal : having a hemihedral form in which half the octants have the full number of planes hemiholohedral tetrahedron hemiholohedral sphenoid …   Useful english dictionary

  • trigonododecahedron — |trigənō, (|)trī|gōnə+ noun Etymology: International Scientific Vocabulary trigon + dodecahedron : a trigonal tristetrahedron : the hemihedral form of the isometric trapezohedron …   Useful english dictionary

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