| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
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| L/S | lactase/sucrase [ratio]; lecithin/ sphingomyelin [ratio]; lipid/saccharide [ratio]; longitudinal sec... |
| A/G ratio | Albumin/Globulin ratio; ¾ËºÎ¹Î´ë ±Û·ÎºÒ¸°ÀÇ ºñÀ² |
| S/D ratio | Systolic / Diastolic ratio |
| C/N | carbon/nitrogen [ratio]; carrier/ noise [ratio] |
| L/S ratio | Lecithin/sphingomyelin ratio |
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| APC SR | APC sensitivity ratio |
| AOR | Adjusted Odds Ratio |
| ACCR | Amylase-creatinine clearance ratio |
| AKBR | Arterial blood ketone body ratio |
| aspect ratio | <radiobiology> In toroidal geometry, the ratio of the major diameter (total width of the torus) to the minor diameter (width of a slice taken through one side of the ring). In inertial-confinement fusion, aspect ratio refers to the ratio of a fuel pellet's radius to its wall thickness. (09 Oct 1997) |
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| low aspect ratio | <physics> An aspect ratio for a torus that is small (minor radius is almost as big as major radius). There are many fusion devices which are designed to have a low aspect ratio. Such devices look more like tractor tires than bicycle tires, as toruses go. There are reasons to believe that low aspect ratio devices will offer some advantages for a fusion reactor. Usually, ease of theoretical and/or numerical analysis is not one of these advantages. (16 Mar 1998) |
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| aspect | 1. The act of looking; vision; gaze; glance. "The basilisk killeth by aspect." "His aspect was bent on the ground." (Sir W. Scott) 2. Look, or particular appearance of the face; countenance; mien; air. "Serious in aspect." "[Craggs] with aspect open shall erect his head." (Pope) 3. Appearance to the eye or the mind; look; view. "The aspect of affairs." "The true aspect of a world lying in its rubbish." (T. Burnet) 4. Position or situation with regard to seeing; that position which enables one to look in a particular direction; position in relation to the points of the compass; as, a house has a southern aspect, that is, a position which faces the south. 5. Prospect; outlook. "This town affords a good aspect toward the hill from whence we descended." (Evelyn) 6. <astronomy> The situation of planets or stars with respect to one another, or the angle formed by the rays of light proceeding from them and meeting at the eye; the joint look of planets or stars upon each other or upon the earth. The aspects which two planets can assume are five; sextile, when the planets are 60 deg apart; quartile, or quadrate, when their distance is 90 deg or the quarter of a circle; trine, when the distance is 120 deg; opposition, when the distance is 180 deg, or half a circle; and conjunction, when they are in the same degree. Astrology taught that the aspects of the planets exerted an influence on human affairs, in some situations for good and in others for evil. 7. <astronomy> The influence of the stars for good or evil; as, an ill aspect. "The astrologers call the evil influences of the stars evil aspects. <geometry>" Aspect of a plane, the direction of the plane. Origin: L. Aspectus, fr. Aspicere, aspectum, to look at; ad + spicere, specere, to look, akin to E. Spy. Source: Websters Dictionary (01 Mar 1998) |
| absolute terminal innervation ratio | The number of motor endplates divided by the number of terminal axons related to them. (05 Mar 2000) |
| accommodative convergence-accommodation ratio | The amount of convergence (measured in prism diopters of convergence) divided by the amount of accommodation (measured in diopters) required to direct both eyes upon an object. (05 Mar 2000) |
| A/G ratio | <abbreviation> Albumin-globulin ratio. (05 Mar 2000) |
| albumin-globulin ratio | The ratio of albumin to globulin in the serum or in the urine in kidney disease; the normal ratio in the serum is approximately 1.55. (05 Mar 2000) |
| ALT:AST ratio | The ratio of serum alanine aminotransferase to serum aspartate aminotransferase; elevated serum levels of both enzymes characterise hepatic disease; when both levels are abnormally elevated and the ALT:AST ratio is greater than 1.0, severe hepatic necrosis or alcoholic hepatic disease is likely; when the ratio is less than 1.0, an acute non-alcoholic hepatic condition is favoured. (05 Mar 2000) |
| amylase-creatinine clearance ratio | A test for the diagnosis of acute pancreatitis; it is determined by measuring amylase and creatinine in serum and urine in apparently healthy individuals the renal clearance of amylase is less than 5% that of creatinine; in acute pancreatitis the ratio is said to be greater than 0.05 or 5%. (05 Mar 2000) |
| at/gc ratio | <molecular biology> The ratio of adenine-thymine base pairs to guanine-cytosine base pairs on a DNA molecule. (09 Oct 1997) |
| basic reproductive rate, ratio | <epidemiology> See Reproductive Ratio. (05 Dec 1998) |
| body-weight ratio | Body weight (in grams) divided by stature (in centimeters). (05 Mar 2000) |
| branching ratio | <radiobiology> In a fusion reaction involving two nuclei, there are typically a variety of possible sets of products which can form. The branching ratio for a particular set of products is the probability that that set of products will be produced. (09 Oct 1997) |
| cardiothoracic ratio | The ratio of the horizontal diameter of the heart to the inner diameter of the rib cage at its widest point as determined on a chest roentgenogram. (05 Mar 2000) |
| magnetogyric ratio | In nuclear magnetic resonance, the ratio of the magnetic dipole moment of the nucleus to the nuclear spin angular momentum; the gyromagnetic ratio is a unique value for each type of nucleus. Synonym: magnetogyric ratio. (05 Mar 2000) |
| variance ratio | The distribution of the ratio of two independent estimates of the same variance from a gaussian distribution based on samples of sizes (n + 1) and (m + 1) respectively. Estimates are usually based on one such sample analyzed in such a way as to make them independent e.g., analysis of variance; and F may be used to test a null hypothesis that the observed differences among sample means is no greater than could readily be accounted for by chance. (05 Mar 2000) |
| aspect ratio | the ratio of the width to the height of a tv picture |
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