| PP | diphosphate group; emphysema [pink puffers]; near point of accommodation [Lat. punctum proximum]; pa... |
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| PPT | parietal pleural tissue; partial prothrombin time; peak-to-peak threshold; Pfeiffer-Palm-Teller [syn... |
| Pz | 4-phenylazobenzylycarbonyl; parietal midline electrode placement in electroencephalography |
| SPL | skin potential level; sound pressure level; splanchnic; spontaneous lesion; staphylococcal phage lys... |
| ECG | Electro-Cardio-Graphy(-Gram); 심전도 = EKG 1. Conducting System Structu... |
| foramen caecum of frontal bone | <anatomy> Blind or caecal foramen of the frontal bone; the blind foramen formed immediately anterior to the crista galli by a notch at the lower end of the frontal crest and its articulation with the ethmoid bone. It is insignificant postnatally, but gives passage to vessels during development. Synonym: foramen caecum ossis frontalis, blind foramen of frontal bone, caecal foramen of frontal bone. (05 Mar 2000) |
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| frontal bone | The large single bone forming the forehead and the upper margin and roof of the orbit on either side; it articulates with the parietal, nasal, ethmoid, maxillary, and zygomatic bones, and with the lesser wings of the sphenoid. Synonym: os frontale, coronale. (05 Mar 2000) |
| frontal border of sphenoid bone | The margin of the greater wing of the sphenoid bon that articulates with the frontal bone. Synonym: margo frontalis ossis sphenoidalis. (05 Mar 2000) |
| frontal process of zygomatic bone | The process of the zygomatic bone which extends upward to form the lateral margin of the orbit and articulates with the frontal bone and greater wing of the sphenoid bone. Synonym: frontosphenoidal process, processus frontalis ossis zygomatici. (05 Mar 2000) |
| bone within a bone | <radiology> STOP heavy metal, S: sickle cell disease, T: Thorotrast, O: osteopetrosis, P: Paget's disease, heavy metals, hypervitaminosis D (12 Dec 1998) |
| anterior margin | The ventral or most forward margin of a structure. Synonym: anterior margin, ventral border. (05 Mar 2000) |
| articular margin | A ring of fibrocartilage attached to the margin of the glenoid cavity of the scapula to increase its depth. Synonym: labrum glenoidale, articular margin, circumferential cartilage, glenoid ligament, glenoidal lip, ligamentum glenoidale. (05 Mar 2000) |
| margin | 1. A border; edge; brink; verge; as, the margin of a river or lake. 2. Specifically: The part of a page at the edge left uncovered in writing or printing. 3. The difference between the cost and the selling price of an article. 4. Something allowed, or reserved, for that which can not be foreseen or known with certainty. 5. Collateral security deposited with a broker to secure him from loss on contracts entered into by him on behalf of his principial, as in the speculative buying and selling of stocks, wheat, etc. Margin draft, that part of a course, as of slates or shingles, which is not covered by the course immediately above it. See Gauge. Synonym: Border, brink, verge, brim, rim. Origin: OE. Margine, margent, L. Margo, ginis. Cf. March a border, Marge. Source: Websters Dictionary (01 Mar 1998) |
| margin of acetabulum | The rim of bone around the acetabulum to which is attached the labrum acetabulare. Synonym: limbus acetabuli, margo acetabularis. (05 Mar 2000) |
| margin of fossa ovalis | A muscular ring surrounding the fossa ovalis in the wall of the right atrium of the heart. Synonym: annulus ovalis, margin of fossa ovalis, Vieussens' annulus, Vieussens' isthmus, Vieussens' limbus, Vieussens' ring. (05 Mar 2000) |
| margin of orbit | The mostly sharp edge of the orbital opening which is the peripheral border of the base of the pyramid-shaped orbit. The superior half of the orbital rim is the supraorbital margin; the inferior half is the infraorbital margin. The frontal, maxillary, and zygomatic bones contribute to the orbital rim, which is generally strong to protect the orbital contents. Weak, potential fracture sites of the rim coincide with the sutures between the participating bones. Synonym: margin of orbit. (05 Mar 2000) |
| margin of safety | The margin between the minimal therapeutic dose and the minimal toxic dose of a drug. (05 Mar 2000) |
| margin of the tongue | The lateral border that separates the dorsum from the inferior surface of the tongue on each side, the two borders meeting anteriorly at the apex. Synonym: margo linguae. (05 Mar 2000) |
| gingival margin | The most coronal portion of the gingiva surrounding the tooth, the edge of the free gingiva. Synonym: cervical margin, gingival crest. (05 Mar 2000) |
| cavity margin | The periphery of a filling, the line of junction between a restoration and the external surface of a tooth. (05 Mar 2000) |