| PEL | peritoneal exudate lymphocyte; permissible exposure limit |
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| PEM | pediatric emergency medicine; peritoneal exudate macrophage; polymorphic epithelial mucin; prescript... |
| PF | pair feeding; peak flow; perfusion fluid; pericardial fluid; periosteal fibroblast; peritoneal fluid... |
| PM | after death (Lat. post mortem); after noon [Lat. post meridiem]; mean pressure; pacemaker; pantomogr... |
| PP | diphosphate group; emphysema [pink puffers]; near point of accommodation [Lat. punctum proximum]; pa... |
| fossa of lacrimal sac | A fossa formed by the lacrimal bone and the frontal process of the maxilla, lodging the lacrimal sac. Synonym: fossa sacci lacrimalis. (05 Mar 2000) |
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| anterior recess | A circumscript deepening of the interpeduncular fossa in the direction of the mamillary bodies. Synonym: recessus anterior. (05 Mar 2000) |
| anterior recess of tympanic membrane | A slitlike space on the tympanic wall between the anterior malleolar fold and the tympanic membrane. Synonym: recessus membranae tympani anterior, Troltsch's pockets, Troltsch's recesses. (05 Mar 2000) |
| azygoesophageal recess | The region below the azygos vein arch in which the right lung intrudes into the mediastinum between the heart and vertebral column, bordered on the left by the oesophagus. (05 Mar 2000) |
| caecal recess | One of several small pockets sometimes found extending alongside the right margin of the ascending colon near the caecum. Synonym: recessus retrocaecalis, caecal recess. (05 Mar 2000) |
| pancreaticoenteric recess | A recess of the embryonic peritoneal cavity that develops into the adult omental bursa. (05 Mar 2000) |
| vein of lateral recess of fourth ventricle | A small vein originating in the cerebellar tonsil, coursing by the lateral recess of the fourth ventricle on its way to terminate in the petrosal vein. Synonym: vein of lateral recess of fourth ventricle. (05 Mar 2000) |
| paraduodenal recess | An occasional recess in the peritoneum to the left of the terminal portion of the duodenum located behind a fold containing the inferior mesenteric vein. Synonym: recessus paraduodenalis, fossa venosa, paraduodenal fossa. (05 Mar 2000) |
| recess | 1. A withdrawing or retiring; a moving back; retreat; as, the recess of the tides. "Every degree of ignorance being so far a recess and degradation from rationality." (South) "My recess hath given them confidence that I may be conquered." (Eikon Basilike) 2. The state of being withdrawn; seclusion; privacy. "In the recess of the jury they are to consider the evidence." (Sir M. Hale) "Good verse recess and solitude requires." (Dryden) 3. Remission or suspension of business or procedure; intermission, as of a legislative body, court, or school. "The recess of . . . Parliament lasted six weeks." (Macaulay) 4. Part of a room formed by the receding of the wall, as an alcove, niche, etc. "A bed which stood in a deep recess." (W. Irving) 5. A place of retirement, retreat, secrecy, or seclusion. "Departure from his happy place, our sweet Recess, and only consolation left." (Milton) 6. Secret or abstruse part; as, the difficulties and recesses of science. 7. <botany> A sinus. Origin: L. Recessus, fr. Recedere, recessum. See Recede. Source: Websters Dictionary (01 Mar 1998) |
| parotid recess | A deep hollow on the side at the sides of the face flanking the posterior aspect of the ramus of the mandible with its attached muscles which is occupied by the parotid gland; it is lined with fascial laminae (the parotid sheath) derived from the investing layer of deep cervical fascia; the structures bounding the space collectively constitute the parotid bed. Surgeons operating in the area take advantage of the fact that the anteroposterior dimensions of the parotid space increase with protrusion of the mandible. Synonym: parotid recess, recessus parotideus. (05 Mar 2000) |
| Reichert's cochlear recess | A small depression on the inner wall of the vestibule of the labyrinth at the portion of the pyramid of vestibule, between the two limbs into which the vestibular crest divides posteriorly; it is perforated by foramina giving passage to fibres which the cochlear branch of the vestibulocochlear nerve sends to the posterior extremity of the cochlear duct. Synonym: recessus cochlearis, Reichert's cochlear recess. (05 Mar 2000) |
| cerebellopontine recess | The angle formed at the junction of cerebellum, pons, and medulla. Synonym: pontocerebellar recess. (05 Mar 2000) |
| retrocaecal recess | One of several small pockets sometimes found extending alongside the right margin of the ascending colon near the caecum. Synonym: recessus retrocaecalis, caecal recess. (05 Mar 2000) |
| retroduodenal recess | A peritoneal recess occasionally found behind the third part of the duodenum, between it and the aorta. Synonym: recessus retroduodenalis, infraduodenal fossa, retroduodenal fossa. (05 Mar 2000) |
| mesentericoparietal recess | A peritoneal fossa that has been seen in a few cases in which the jejunum has no mesentery but is attached to the posterior parietal peritoneum; the fossa begins at the point where the mesentery ends, and is seen on raising up the knuckle of free intestine. Synonym: Broesike's fossa, fossa parajejunalis, mesentericoparietal fossa, mesentericoparietal recess. (05 Mar 2000) |