| SAM | S-adenosyl-L-methionine; scanning acoustic microscope; senescence accelerated mouse; sex arousal mec... |
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| SAQ | short arc quadriceps [muscle] |
| arc-flash conjunctivitis | Acute keratoconjunctivitis resulting from exposure to intense ultraviolet irradiation. Synonym: actinic conjunctivitis, arc-flash conjunctivitis, flash keratoconjunctivitis, ophthalmia nivalis, snow conjunctivitis, welder's conjunctivitis. (05 Mar 2000) |
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| arc of buehler | <radiology> Persistent embryologic anastomosis between coeliac artery and superior mesenteric artery (12 Dec 1998) |
| arc of riolan | <radiology> Inconstant anastomotic artery between middle and left colic aa. (12 Dec 1998) |
| arc perimeter | A perimeter consisting of a saemicircular frame at the centre of which the patient looks while a white object is moving along the arc, the exact point where it becomes visible or invisible being noted and recorded on a chart. (05 Mar 2000) |
| auricular arc | A line carried over the cranium from the centre of one external auditory meatus to that of the other. Synonym: interauricular arc. (05 Mar 2000) |
| bois d'arc | <botany> The Osage orange (Maclura aurantiaca). "The bois d'arc seems to be the characteristic growth of the black prairies." (U. S. Census (1880)) Origin: F, bow wood. So called because used for bows by the Western Indians. Source: Websters Dictionary (01 Mar 1998) |
| bregmatolambdoid arc | The line running along the sagittal suture from the bregma to the apex of the lambdoid suture. (05 Mar 2000) |
| reflex arc | The route followed by nerve impulses in the production of a reflex act, from the peripheral receptor organ through the afferent nerve to the central nervous system synapse and then through the efferent nerve to the effector organ. (05 Mar 2000) |
| Riolan's arc | The series of arterial arches formed in the mesentery by anastomoses between adjacent jejunal and ileal arteries and from which vasa recta arise. The arterial arcades of the ileum are shorter and more complex than those of the jejunum. See: arterial arches of ileum, arterial arches of jejunum. Synonym: intermesenteric arterial anastomosis, Riolan's arc, Riolan's arcades. (05 Mar 2000) |
| crater arc | An arc of a direct current that forms a pitlike excavation at the positive pole. (05 Mar 2000) |
| pulmonary arc | An obsolete term for pulmonary salient. (05 Mar 2000) |
| nasobregmatic arc | A line running through the midline of the forehead from the nasion to the bregma. (05 Mar 2000) |
| naso-occipital arc | The arc in the midline from the root of the nose to the inferior limit of the external occipital protuberance. (05 Mar 2000) |
| interauricular arc | A line carried over the cranium from the centre of one external auditory meatus to that of the other. Synonym: interauricular arc. (05 Mar 2000) |
| unipolar arc | <radiobiology> Arc between a metal surface and a plasma in contact with it. Such an arc requires only one electrode and is maintained by the thermal energy of the electrons. (09 Oct 1997) |