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Relating to the petrous and the squamous portions of the temporal bone, which are usually united at birth by the petrosquamosal suture.
Farlex Partner Medical Dictionary © Farlex 2012
petrosomastoid(pĕ-trō″sō-măs′toyd) [″ + Gr. mastos, breast, + eidos, form, shape]
Pert. to the petrous portion of the temporal bone and its mastoid process.
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