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definitions

pyritohedron

[pahy-rahy-tuh-hee-druh n, puh-, pahy-rahy-]

noun Crystallography.

a crystal form of 12 pentagonal faces.

Nearby words

  1. pyrimidine,
  2. pyriphlegethon,
  3. pyrite,
  4. pyrites,
  5. pyritic,
  6. pyritous,
  7. pyro,
  8. pyro-,
  9. pyrobitumen,
  10. pyroborate

Origin of pyritohedron

1865–70; pyrito- (combining form of pyrite) + -hedron
Also called pentagonal dodecahedron.
Related formspy·ri·to·he·dral, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019