Definitions
from The Century Dictionary.
- Of or pertaining to the petrous and mastoid parts of the temporal bone: as, petromastoid cells; the petromastoid bone.
- noun The petromastoid bone.
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Anat.) Of or pertaining to the petrous and mastoid parts of the temporal bone, periotic.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective anatomy Of or relating to the
petrous andmastoid parts of thetemporal bone ;periotic .
Etymologies
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Examples
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The petromastoid part is developed from four centers, which make their appearance in the cartilaginous ear capsule about the fifth or sixth month.
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The tympanic ring unites with the squama shortly before birth; the petromastoid part and squama join during the first year, and the tympanohyal portion of the styloid process about the same time (Figs. 143, 144).
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