TETRAHEDRON

tetrahedron

(noun) any polyhedron having four plane faces

Source: WordNet® 3.1


Etymology

Noun

tetrahedron (plural tetrahedrons or tetrahedra)

(geometry) A polyhedron with four faces; the regular tetrahedron, the faces of which are equal equilateral triangles, is one of the Platonic solids.

Source: Wiktionary


Tet`ra*he"dron, n. Etym: [Tetra- + Gr. (Geom.)

Definition: A solid figure inclosed or bounded by four triangles.

Note: In crystallography, the regular tetrahedron is regarded as the hemihedral form of the regular octahedron. Regular tetrahedron (Geom.), a solid bounded by four equal equilateral triangles; one of the five regular solids.

Source: Webster’s Unabridged Dictionary 1913 Edition



RESET




Word of the Day

7 October 2024

QUARTILE

(noun) (statistics) any of three points that divide an ordered distribution into four parts each containing one quarter of the scores


coffee icon

Coffee Trivia

Brazil is the largest coffee producer in the world. Each year Brazil exports more than 44 million bags of coffee. Vietnam follows at exporting over 27 million bags each year.

coffee icon