| MA | malignant arrhythmia; management and administration; mandelic acid; masseter; Master of Arts; matern... |
|---|---|
| mA, ma | milliampere; meter-angle |
| MAR | main admissions room; marasmus; marrow; maximal aggregation ratio; medication administration record;... |
| MAS | magic angle spinning; Manifest Anxiety Scale; maximum average score; McCune-Albright syndrome; mecon... |
| NAG | N-acetyl-D-glucosaminidase; narrow-angle glaucoma; nonagglutinable |
| S-N-A angle | In cephalometrics, an angle measuring the anteroposterior relationship of the maxillary basal arch on the anterior cranial base; it shows the degree of maxillary prognathism. See: subspinale. Origin: sella-nasion-subspinale (or point A) (05 Mar 2000) |
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| S-N-B angle | An angle showing the anterior limit of the mandibular basal arch in relation to the anterior cranial base. See: supramentale. Origin: sella-nasion-supramentale (or point B) (05 Mar 2000) |
| spaces of iridocorneal angle | Irregularly shaped endothelium-lined spaces within the trabecular reticulum, through which the aqueous filters to reach the sinus venosus sclerae. Synonym: spatia anguli iridocornealis, ciliary canals, Fontana's spaces. (05 Mar 2000) |
| sphenoidal angle | Angle formed by the intersection at the top of the sella turcica (dorsum sellae), of lines coming from the nasal point and from the tip of the rostrum of the sphenoid. Synonym: sphenoidal angle of parietal bone. (05 Mar 2000) |
| narrow-angle glaucoma | angle-closure glaucoma |
| neck-shaft angle | <orthopaedics> The angle formed by the meeting of a line drawn through the shaft of the femur with one passing through the long axis of the femoral neck; normally it is about 127 |
| sternal angle | The angle between the manubrium and the body of the sternum at the manubriosternal junction. Marks the level of the second costal cartilage (rib) for counting ribs or intercostal spaces. Denotes level of aortic arch, bifurcation of trachea, and T4/T5 intervertebral disc. Synonym: angulus sterni, Louis' angle, Ludwig's angle, manubriosternal junction. (05 Mar 2000) |
| sternoclavicular angle | The angle formed by the junction of the clavicle with the sternum. (05 Mar 2000) |
| subpubic angle | The angle formed between the inferior rami of the pubic bones. In the female, the angle approximates that angle between the widely extended thumb and index finger (90 |
| substernal angle | The angle between the lower borders of the costal cartilages of the two sides as they approach the sternum. Synonym: angulus infrasternalis, substernal angle. (05 Mar 2000) |
| Daubenton's angle | An angle formed by the junction, at the opisthion, of lines coming from the basion and from the projection in the median plane of the lower border of the orbits. See: Daubenton's line, Daubenton's plane. Synonym: angulus occipitalis ossis parietalis, occipital angle of parietal bone. (05 Mar 2000) |
| superior angle of scapula | Formerly named the medial angle, it lies at the junction of the superior and medial borders of the bone. Synonym: angulus superior scapulae. (05 Mar 2000) |
| sylvian angle | The angle formed by the sylvian line and a line perpendicular to the horizontal plane tangential to the highest point of the hemisphere. (05 Mar 2000) |
| disparity angle | The difference in position of images on the retina, still permitting fusion. (05 Mar 2000) |
| duodenojejunal angle | An abrupt bend in the small intestine at the junction of the duodenum and jejunum. Synonym: flexura duodenojejunalis, duodenojejunal angle. (05 Mar 2000) |