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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 tet·ra·he·dron /ˌtɛtrəˈhidrən/
 四面體

From: Taiwan MOE computer dictionary

 tetrahedron
 四面體

From: Webster's Revised Unabridged Dictionary (1913)

 Tet·ra·he·dron n.  Geom. 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.
 ◄ ►

From: WordNet (r) 2.0

 tetrahedron
      n : any polyhedron having four plane faces
      [also: tetrahedra (pl)]