Tetrahedron

Pronunciation

• enPR: tÄ•trÉ™hÄ“'drÉ™n, IPA: /tÉ›trəˈhiːdrÉ™n/

Origin

From Ancient Greek τετράεδρόν ("triangle-based pyramid"), from τετράεδρός, from τετράς ("four") + ἕδρα ("seat").

Full definition of tetrahedron

Noun

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

Related terms

• tetrahedral