| PIP | paralytic infantile paralysis; peak inflation pressure, peak inspiratory pressure; periodic interim ... |
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| PLD | peripheral light detection; phospholipase D; platelet defect; polycystic liver disease; posterior la... |
| PLF | perilymphatic fistula; posterior lung fiber |
| PLL | peripheral light loss; phase-locked loop; poly-L-lysine; pressure length loop; posterior longitudina... |
| PLMV | posterior leaf mitral valve |
| superior longitudinal sulcus | The groove in the midline of the inner table of the calvaria lodging the superior sagittal sinus. Synonym: sulcus sinus sagittalis superioris, sagittal groove, sagittal sulcus, superior longitudinal sulcus. (05 Mar 2000) |
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| superior occipital sulcus | One of several small and variable sulci bordering the superior occipital gyri on the upper aspect of the occipital lobe of the cerebrum. Synonym: sulcus occipitalis superior. (05 Mar 2000) |
| superior petrosal sulcus | A groove on the crest of the petrous portion of the temporal bone in which rests the superior petrosal sinus. Synonym: sulcus sinus petrosi superioris, superior petrosal sulcus. (05 Mar 2000) |
| superior pulmonary sulcus tumour | <oncology, tumour> Tumour originating from the superior sulcus of the lung that invades all or a portion of the brachial plexus. (16 Dec 1997) |
| superior temporal sulcus | The longitudinal sulcus that separates the superior and middle temporal gyri. Synonym: sulcus temporalis superior, superior temporal fissure. (05 Mar 2000) |
| supra-acetabular sulcus | A groove, posterosuperior to the acetabulum, that is the attachment for the reflected head of the rectus femoris muscle. Synonym: sulcus supra-acetabularis, supra-acetabular sulcus. (05 Mar 2000) |
| inferior frontal sulcus | A sagittal fissure on the lateral convex surface of each frontal lobe of the cerebrum demarcating the middle from the inferior frontal gyrus. Synonym: sulcus frontalis inferior. (05 Mar 2000) |
| inferior petrosal sulcus | A groove lodging the inferior petrosal sinus, formed by union of similarly named grooves in the petrous part of the temporal bone and the basilar part of the occipital bone. Synonym: sulcus sinus petrosi inferioris, inferior petrosal groove, inferior petrosal sulcus. (05 Mar 2000) |
| inferior temporal sulcus | The sulcus on the basal aspect of the temporal lobe that separates the fusiform gyrus from the inferior temporal gyrus on its lateral side. Synonym: sulcus temporalis inferior, Clevenger's fissure. (05 Mar 2000) |
| infrapalpebral sulcus | The hollow or furrow below the lower eyelid. Synonym: sulcus infrapalpebralis. (05 Mar 2000) |
| internal spiral sulcus | A concavity in the floor of the cochlear duct formed by the overhanging labium vestibulare. Synonym: sulcus spiralis internus. (05 Mar 2000) |
| interparietal sulcus | A horizontal sulcus extending back from the postcentral sulcus over some distance, then dividing perpendicularly into two branches so as to form, with the postcentral sulcus, a figure H. It divides the parietal lobe into superior and inferior parietal lobules. Synonym: sulcus intraparietalis, interparietal sulcus, intraparietal sulcus of Turner, Turner's sulcus. (05 Mar 2000) |
| intertubercular sulcus | A furrow running down the shaft of the humerus between the two tubercles, lodging the tendon of the long head of the biceps, and giving attachment in its floor to the latissimus dorsi muscle. Synonym: sulcus intertubercularis, bicipital groove, intertubercular sulcus. (05 Mar 2000) |
| intragracile sulcus | A fissure between the gracilis minor and gracilis posterior lobuli of the cerebellum. Synonym: sulcus intragracilis. (05 Mar 2000) |
| intraparietal sulcus | A horizontal sulcus extending back from the postcentral sulcus over some distance, then dividing perpendicularly into two branches so as to form, with the postcentral sulcus, a figure H. It divides the parietal lobe into superior and inferior parietal lobules. Synonym: sulcus intraparietalis, interparietal sulcus, intraparietal sulcus of Turner, Turner's sulcus. (05 Mar 2000) |