| 释义 | te·tar·to·he·dral \tə̇|tärd.ō|hēdrəl\ adjective
 Etymology: tetart- + -hedral
 1. of a crystal  : having one fourth the number of planes required by complete symmetry — compare holohedral
 2.  : having the symmetry appropriate to a tetartohedral form
 • te·tar·to·he·dral·ly \-drəlē, -li\ adverb
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