Petromastoid Pet`ro*mas"toid, a. [Petro + mastoid.] (Anat.) Of or pertaining to the petrous and mastoid parts of the temporal bone, periotic. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • petromastoid — Relating to the petrous and the squamous portions of the temporal bone, which are usually united at birth by the petrosquamosal suture. SYN: petrosomastoid. * * * pet·ro·mas·toid (pet″ro masґtoid) 1. pertaining to the petrous portion of the …   Medical dictionary

  • petromastoid fissure — fissura tympanomastoidea …   Medical dictionary

  • petromastoid part of temporal bone — a name given to the pars petrosa ossis temporalis when describing it as having petrous and mastoid parts …   Medical dictionary

  • Ossification of temporal bone — 1. Outer surface of petromastoid part. 2. Outer surface of tympanic ring. 3. Inner surface of squama. Figure 7& …   Wikipedia

  • petrosomastoid — SYN: petromastoid. * * * pe·tro·so·mas·toid (pĕ tro″so masґtoid) petromastoid …   Medical dictionary

  • fissura tympanomastoidea — [TA] tympanomastoid fissure: an external fissure on the inferior and lateral aspect of the skull between the tympanic portion and the mastoid process of the temporal bone; the auricular branch of the vagus nerve often passes through it. Called… …   Medical dictionary

  • pars petrosa ossis temporalis — [TA] petrous part of temporal bone: a pyramid of dense bone located at the base of the cranium; one of the three parts of the temporal bone, it houses the organ of hearing. Some anatomists divide it into petrous and mastoid subparts and call it… …   Medical dictionary

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