Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The upper and outer element of periotic bone, in humans forming a part of the temporal bone.

from the GNU version of the Collaborative International Dictionary of English

  • n. The upper and outer element of periotic bone, -- in man forming a part of the temporal bone.

from The Century Dictionary and Cyclopedia

  • Literally, upon the ear: applied to a center of ossification in the mastoid region of the periotic bone.
  • n. In zoology and anatomy, one of the three principal bones or separate ossifications which compose the periotic bone or auditory capsule: distinguished from the pro├Âtic and the opisthotic, and also from the pterotic when this fourth element is present.
  • n. One of the outer or lateral pair of the supratemporal bones in the cranial roof of the stegocephalian Amphibia, regarded as bones of dermal origin.
  • n. In ichthyology, a lateral, posterior paired bone of the cranium, usually forming a blunt projection.

Etymologies

epi- + Ancient Greek ear. (Wiktionary)

Examples

  • A third (pterotic) roofs in the tympanic cavity and antrum; while the fourth (epiotic) appears near the posterior semicircular canal and extends to form the mastoid process (Vrolik).

    II. Osteology. 5a. 4. The Temporal Bone

Comments

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