Definition of periotic in US English:

periotic

noun

Anatomy Zoology
  • The bone forming the otic capsule of the inner ear, consisting of fused prootic, epiotic, and opisthotic bones.

adjective

Anatomy Zoology
  • Surrounding the ear, especially the inner ear; specifically designating each of the three bones (prootic, epiotic, and opisthotic) which constitute the otic capsule; designating the capsule itself.

Origin

Mid 19th century; earliest use found in Philosophical Transactions of the Royal Society of London. From peri- + otic.

Pronunciation

periotic

/pɛrɪˈɒtɪk/