Definitions

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

  • adj. Of or relating to a tetrahedron.
  • adj. Having four faces.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. in the shape of a tetrahedron
  • adj. having four faces, four apices and six edges

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having, or composed of, four sides.
  • adj.
  • adj. Having the form of the regular tetrahedron.
  • adj. Pertaining or related to a tetrahedron, or to the system of hemihedral forms to which the tetrahedron belongs.

from The Century Dictionary and Cyclopedia

  • Pertaining to a tetrahedron.
  • In crystallography: Having the form of the regular tetrahedron.
  • Pertaining or relating to a tetrahedron, or to the system of forms to which the tetrahedron belongs: as, tetrahedral hemihedrism (see hemihedrism).

Etymologies

tetra- + -hedral (Wiktionary)

Examples

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