单词 | tetrahedron |
释义 | tet·ra·he·dron ![]() n. pl. tet·ra·he·drons or tet·ra·he·dra (-drə) A polyhedron with four faces. [Greek tetraedron, from neuter of tetraedros, four-faced : tetra-, tetra- + -hedros, sided; see -HEDRON.] ![]() |
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