disphenoid

复正方楔; 双半面晶形

发音

US

词形变化

disphenoids 复数 disphenoids

释义与例句

n.
  1. 1.

    A non-regular tetrahedron whose four faces are congruent acute-angled triangles.

    数学

    1973, H. S. M. Coxeter, 3rd Edition, unnumbered page, To make a model of a disphenoid, cut out an acute angled triangle and fold it along the joins of the mid-points of the sides. The disphenoid is said to be rhombic or tetragonal according as the triangle is isosceles or scalene.

adj.
  1. 1.

    Of or pertaining to a wedge-shaped crystal form of the tetragonal or orthorhombic system.

    化学 地质
  2. 2.

    Of or pertaining to a crystal form bounded by eight scalene triangles arranged in pairs, constituting a tetragonal scalenohedron.

    化学 地质

相关短语

snub disphenoid

词源

From di- (“twice, double”) + sphenoid (“wedge-shaped crystal or bone of the skull”).

来源：wiktionary