Definitions

from The Century Dictionary.

  • Radiating in three directions; sending off three rays or processes; trifurcate.
  • In anatomy, specifically noting one of the lateral fissures of the brain.
  • In sponges, noting a type of spicule. See II.
  • noun A triradiate sponge-spicule.

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

  • adjective Having three rays.

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

  • adjective Having three rays.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

tri- +‎ radiate

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Examples

  • Although this particular result may be due to the limited sampling of avian taxa, the presence of a deinonychosaurian key feature (a hyperextendible second toe) and the absence of two avian key features a triradiate palatine (3) and a fully reversed first toe in Archaeopteryx challenges the monophyly of Aves as currently recognized.

    New Archaeopteryx fossil provides further insight into bird, dinosaur evolution - The Panda's Thumb 2005

  • The root (radix penis) of the penis is triradiate in form, consisting of the diverging crura, one on either side, and the median urethral bulb.

    XI. Splanchnology. 3c. 5. The Penis 1918

  • In the articulations of the heads of the tenth, eleventh, and twelfth ribs, each of which articulates with a single vertebra, the triradiate arrangement does not exist; but the fibers of the ligament in each case are connected to the vertebra above, as well as to that with which the rib articulates.

    III. Syndesmology. 5e. Costovertebral Articulations 1918

  • This figure shows the cerebrum still more enlarged, and with a triradiate cavity (l, 1, 2. 3

    The Common Frog 1874

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