Emily Dickinson Lexicon
Definition for TET-RA-HE'DRON
TET-RA-HE'DRALTET-RA-HEX-A-HE'DRAL
TET-RA-HE'DRON, n. [Gr. τετρα, four, and εδρα, side.]
In geometry, a figure comprehended under four equilateral and equal triangles; or one of the five regular platonic bodies of that figure.
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