2. (Crystallog.)
(a) Having the form of the regular tetrahedron.
(b) Pertaining or related to a tetrahedron, or to the
system of hemihedral forms to which the tetrahedron
belongs.
[1913 Webster]
{Tetrahedral angle} (Geom.), a solid angle bounded or inclosed by four plane angles. [1913 Webster]
The Collaborative International Dictionary of English. 2000.
tetrahedral — [te΄trə hē′drəl] adj. of, or having the form of, a tetrahedron tetrahedrally adv … English World dictionary
tetrahedral — tetrahedron ► NOUN (pl. tetrahedra or tetrahedrons) ▪ a solid having four plane triangular faces. DERIVATIVES tetrahedral adjective … English terms dictionary
Tetrahedral angle — Tetrahedral Tet ra*he dral, a. [See {Tetrahedron}.] 1. Having, or composed of, four sides. [1913 Webster] 2. (Crystallog.) (a) Having the form of the regular tetrahedron. (b) Pertaining or related to a tetrahedron, or to the system of hemihedral… … The Collaborative International Dictionary of English
Tetrahedral number — A pyramid with side length 5 contains 35 spheres. Each layer represents one of the first five triangular numbers. A tetrahedral number, or triangular pyramidal number, is a figurate number that represents a pyramid with a triangular base and… … Wikipedia
Tetrahedral molecular geometry — In a Tetrahedral molecular geometry a central atom is located at the center with four substituents that are located at the corners of a tetrahedron. The bond angles are cos−1(−1/3) ≈ 109.5° when all four substituents are the same, as in CH4. This … Wikipedia
Tetrahedral prism — In geometry, a tetrahedral prism is a convex uniform polychoron (four dimensional polytope). This polychoron has 6 polyhedral cells: 2 tetrahedra connected by 4 triangular prisms. It has 14 faces: 8 triangular and 6 square. It has 16 edges and 8… … Wikipedia
Tetrahedral symmetry — A regular tetrahedron has 12 rotational (or orientation preserving) symmetries, and a total of 24 symmetries including transformations that combine a reflection and a rotation.The group of symmetries that includes reflections is isomorphic to S 4 … Wikipedia
Tetrahedral kite — A tetrahedral kite is a multicelled rigid box kite composed of tetrahedrally shaped cells. The cells are usually arranged in such a way that the entire kite is also a regular tetrahedron. The kite can be described as a compound dihedral kite as… … Wikipedia
Tetrahedral-octahedral honeycomb — The tetrahedral octahedral honeycomb or alternated cubic honeycomb is a space filling tessellation (or honeycomb) in Euclidean 3 space. It is comprised of alternating octahedra and tetrahedra in a ratio of 1:2.It is vertex transitive with 8… … Wikipedia
Tetrahedral carbonyl addition compound — A tetrahedral carbonyl addition compound is an organic compound formed by nucleophilic addition to a carbonyl compound such as an aldehyde or ketone. This provides the carbon with four temporary bonds, one of which is broken when the leaving… … Wikipedia
