| PD | Doctor of Pharmacy; Dublin Pharmacopoeia; interpupillary distance; Paget disease; pancreatic duct; p... |
|---|---|
| PP | diphosphate group; emphysema [pink puffers]; near point of accommodation [Lat. punctum proximum]; pa... |
| Sp | the most posterior point on the posterior contour of the sella turcica; species; specific; specimen;... |
| PCA | 1) Passive Cutaneous Araphylaxis 2) Posterior Cerebral Artery |
| P-COM | Posterior COMmunicating artery |
| aperture of mastoid antrum | The orifice leading from the epitympanic recess to the mastoid antrum. Synonym: aditus ad antrum. (05 Mar 2000) |
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| mastoid | A bony process off the base of the skull that is composed of air cells. Inflammation of the mastoid is known as mastoiditis. (27 Sep 1997) |
| mastoid abscess | An abscess of the mastoid air cells. (05 Mar 2000) |
| mastoid air cells | Numerous small intercommunicating cavities in the mastoid process of the temporal bone that empty into the mastoid or tympanic antrum. Synonym: cellulae mastoideae, mastoid cells, mastoid sinuses. (05 Mar 2000) |
| mastoid angle of parietal bone | The posteroinferior point of the parietal bone. Synonym: angulus mastoideus ossis parietalis. (05 Mar 2000) |
| mastoid antrum | A cavity in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aperture of the mastoid antrum. Synonym: antrum mastoideum, tympanic antrum, Valsalva's antrum. (05 Mar 2000) |
| mastoid bone | The nipple-like projection of the petrous part of the temporal bone. Synonym: processus mastoideus, mastoid bone, temporal apophysis. (05 Mar 2000) |
| mastoid border of occipital bone | The margin of the occipital squama that articulates with the temporal bone. Synonym: margo mastoideus squamae occipitalis, mastoid margin of occipital bone. (05 Mar 2000) |
| mastoid canaliculus | The canal that extends from the jugular fossa laterally through the mastoid process. It transmits the auricular branch of the vagus. Synonym: canaliculus mastoideus, auricular canaliculus. (05 Mar 2000) |
| mastoid cells | Numerous small intercommunicating cavities in the mastoid process of the temporal bone that empty into the mastoid or tympanic antrum. Synonym: cellulae mastoideae, mastoid cells, mastoid sinuses. (05 Mar 2000) |
| mastoid emissary vein | <anatomy, vein> The vein that connects the sigmoid sinus with the occipital vein or one of the tributaries of the external jugular vein by way of the mastoid foramen. Synonym: vena emissaria mastoidea, emissarium mastoideum. (05 Mar 2000) |
| mastoid empyema | <pathology> Inflammation of the mastoid antrum and cells. (18 Nov 1997) |
| mastoid fontanel | The membranous interval on either side between the mastoid angle of the parietal bone, the petrous portion of the temporal bone, and the occipital bone. Synonym: fonticulus mastoideus, fonticulus posterolateralis, Casser's fontanel, posterolateral fontanel. (05 Mar 2000) |
| mastoid foramen | An opening at the posterior portion of the mastoid process, transmitting the mastoid branch of the occipital artery to the dura and an emissary vein to the sigmoid sinus. Synonym: foramen mastoideum. (05 Mar 2000) |
| mastoid fossa | A small depression on the mastoid part of the temporal bone, posterior to the suprameatal spine. Synonym: foveola suprameatica, mastoid fossa, fossa mastoidea, supramastoid fossa. (05 Mar 2000) |