from The American Heritage® Dictionary of the English Language, 4th Edition

  • suffix A crystal or geometric figure having a specified kind or number of surfaces: heptahedron.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • suffix Used in geometry to form the names of solid figures bounded by a certain number of planes (polyhedra).


New Latin, from Greek -edron, neuter of -edros, -sided, from hedrā, face; see sed- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek ἕδρα (hedra, "face of a geometrical solid") (Wiktionary)


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