| superior border of petrous part of temporal bone | The margin that separates the anterior and posterior surfaces of the petrous part of the temporal bone and the lateral part of the middle cranial fossa from the posterior cranial fossa. Synonym: margo superior partis petrosae ossis temporalis, crest of petrous part of temporal bone. (05 Mar 2000) |
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| inferior surface of petrous part of temporal bone | Inferior surface of petrous part of the temporal bone; the portion of the petrous part of the temporal bone that contributes to the external base of the skull. Synonym: facies inferior partis petrosae ossis temporalis. (05 Mar 2000) |
| occipital border of temporal bone | That part of the temporal bone that articulates with the occipital squama. Synonym: margo occipitalis ossis temporalis. (05 Mar 2000) |
| temporal bone | <anatomy> A large irregular bone situated in the base and side of the skull, consisting of three parts, squamous, tympanic and petrous. The bones are distinct at birth; the petrous part contains the vestibulocochlear organ; the bone articulates with the sphenoid, parietal, occipital, and zygomatic bones, and by a synovial joint with the mandible. Synonym: os temporale. (05 Mar 2000) |
| tympanic part of temporal bone | The bony plate forming the greater part of the anterior wall of the bony part of the external acoustic meatus and the tympanic cavity and the posterior wall of the mandibular fossa. Synonym: pars tympanica ossis temporalis, tympanic part of temporal bone. (05 Mar 2000) |
| tympanic plate of temporal bone | The bony plate forming the greater part of the anterior wall of the bony part of the external acoustic meatus and the tympanic cavity and the posterior wall of the mandibular fossa. Synonym: pars tympanica ossis temporalis, tympanic part of temporal bone. (05 Mar 2000) |
| jugular notch of temporal bone | The notch in the temporal bone which forms one boundary of the jugular foramen. Synonym: incisura jugularis ossis temporalis. (05 Mar 2000) |
| zygomatic process of temporal bone | The anterior process of the temporal bone that articulates with the temporal process of the zygomatic bone to form the zygomatic arch. Synonym: processus zygomaticus ossis temporalis. (05 Mar 2000) |
| anterior pyramid | An elongated, white prominence on the ventral surface of the medulla oblongata on either side along the anterior median fissure, corresponding to the pyramidal tract. Synonym: pyramis medullae oblongatae, anterior column of medulla oblongata, anterior pyramid. (05 Mar 2000) |
| base of renal pyramid | The outer broad part of a renal pyramid that lies next to the cortex. Synonym: basis pyramidis renis. (05 Mar 2000) |
| malpighian pyramid | One of a number of pyramidal masses seen on longitudinal section of the kidney; collectively, they constitute the renal medulla, and contain part of the secreting tubules and the collecting tubules. Synonym: pyramis renalis, malpighian pyramid, medullary pyramid. (05 Mar 2000) |
| renal pyramid | One of a number of pyramidal masses seen on longitudinal section of the kidney; collectively, they constitute the renal medulla, and contain part of the secreting tubules and the collecting tubules. Synonym: pyramis renalis, malpighian pyramid, medullary pyramid. (05 Mar 2000) |
| medullary pyramid | One of a number of pyramidal masses seen on longitudinal section of the kidney; collectively, they constitute the renal medulla, and contain part of the secreting tubules and the collecting tubules. Synonym: pyramis renalis, malpighian pyramid, medullary pyramid. (05 Mar 2000) |
| cerebellar pyramid | A subdivision of the inferior vermis of the cerebellum between the tuber and the uvula. Synonym: pyramis vermis, cerebellar pyramid. Pyramid of vestibule, the upper triangular extremity of the crista vestibuli. Synonym: pyramis vestibuli. (05 Mar 2000) |
| petrous pyramid | The part of the temporal bone that contains the structures of the inner ear and the second part of the internal carotid artery; in antenatal life it appears as a separate ossification centre. Synonym: pars petrosa ossis temporalis, periotic bone, petrosal bone, petrous pyramid. (05 Mar 2000) |