单词	tetrahedral
释义	tetrahedral adjective tet·​ra·​he·​dral ˌte-trə-ˈhē-drəl  1 : being a polyhedral angle with four faces 2 : relating to, forming, or having the form of a tetrahedron tetrahedrally ˌte-trə-ˈhē-drə-lē  adverb Example Sentences Recent Examples on the Web For this pyramid, sheer size is not the real superlative; Vegas, after all, has its own, even larger tetrahedral hotel. Boyce Upholt, Outside Online, 10 Aug. 2022 In 1951 Ruben Rausing backed an invention by the engineer Erik Wallenberg: a tetrahedral paper tube that would allow liquids to be sealed inside without any oxygen and be preserved for longer. Amie Tsang, New York Times, 6 Sep. 2019 The breakthrough came when a friend gave him a cheap tetrahedral kite. Joshua Davis, WIRED, 1 June 2003 Word History First Known Use 1794, in the meaning defined at sense 1
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