English Explanatory Dictionary

tetrahedron

English dictionary entry

Meanings

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

Pronunciation

tĕtrəhē'drən /ˌtɛtɹəˈhiːdɹən/ LL-Q1860 (eng)-Vininn126-tetrahedron.wav LL-Q1860 (eng)-Rho9998-tetrahedron.wav

Word forms

tetrahedron tetrahedra tetrahedrons tetraedrum

Etymology

From Ancient Greek τετράεδρον (tetráedron, “triangle-based pyramid”), from τετράεδρος (tetráedros), from τετράς (tetrás, “four”) + ἕδρα (hédra, “seat”). By surface analysis, tetra- + -hedron.

Derived words

fire tetrahedron hexatetrahedron Hill tetrahedron icositetrahedron orthotetrahedron tetrahedral tetrahedrality tetrahedralizable tetrahedrally tetrahedrane tetrahedrite triakis tetrahedron truncated tetrahedron
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