tetrahedron

名词 n.
中文释义
发音 tĕtrəhē'drən

英文释义

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

词形变化

tetrahedra plural tetrahedrons plural tetraedrum alternative,obsolete

词源

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