otocranium

[ō′tō-krānē-əm]

n.

The bony case of the internal and middle ear consisting of the petrous portion of the temporal bone.

Related formso′to•crani•al adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.