• synonyms


n. pl. pla•na (-nə)
  1. A plane or flat surface.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Examples from the Web for planum

Historical Examples

  • The lamina inferior diverges ventrally from the planum terminale anterior to the olfactory eminence.

    Cranial Osteiology of the Hylid Frog, Smilisca baudini

    Linda Trueb

  • Posterior to the transition zone between the planum antorbitale and solum nasi the pars facialis is greatly reduced.