from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Having or formed by three planes meeting at a point.

from The Century Dictionary.

  • Having three faces; three-faced.
  • noun The figure determined by three non-coplanar rays from a point.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective (Geom.) Having three sides or faces; thus, a trihedral angle is a solid angle bounded by three plane angles.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective geometry Having three plane faces that meet at a common point


Sorry, no etymologies found.



Log in or sign up to get involved in the conversation. It's quick and easy.