petrous Hear it!

petrous Definition

pet·rous (pe′trəs, pē′trəs)

adjective

  1. of or like rock; hard; stony

  2. Etymology: ML petrosus

    designating or of that part of the temporal bone which surrounds and protects the internal ear

Etymology: L petrosus, rocky < petra, rock < Gr

petrous Usage Examples

Modifies a noun

bone: The orbits are normal, the petrous bones are normal and the mastoid areas are normal and cellular.