| CSI | calculus surface index; cancer serum index; cavernous sinus infiltration; cervical spine injury; che... |
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| EI | Edmonton injector; electrolyte imbalance; electron impact; electron ionization; emotionally impaired... |
| LR | labeled release; laboratory references; laboratory report; labor room; lactated Ringer [solution]; l... |
| RET | reticular; reticulocyte; retina; retention; retained; right esotropia |
| retic | reticulocyte |
| maturation index | An index indicating the degree of maturation attained by the vaginal epithelium as adjudged by the cell types being exfoliated; serves as an objective means of evaluating hormonal secretion or response; represents the percentage of parabasal cells/intermediate cells/superficials, in that order; "shift to the left" indicates more immature cells on the surface (atrophy), while "shift to the right" indicates more mature epithelium. (05 Mar 2000) |
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| refractive index | <microscopy> The ratio of the velocity of light in a vacuum to the velocity in some medium. Refractive index generally increases with the atomic number of the constituent atoms. (05 Aug 1998) |
| vital index | The ratio of births to deaths within a population during a given time. (05 Mar 2000) |
| Volpe-Manhold Index | An index for comparing the amount of dental calculus in individuals. (05 Mar 2000) |
| volume index | An indication of the relative size (e.g., volume) of erythrocytes, calculated as follows: haematocrit value, expressed as per cent of normal ÷ red blood cell count, expressed as per cent of normal = volume index. (05 Mar 2000) |
| centromeric index | The ratio of the length of the short arm of the chromosome to that of the total chromosome; ordinarily expressed as a percentage. (05 Mar 2000) |
| cephalic index | The ratio of the maximal breadth to the maximal length of the head, obtained by the formula: (breadth × 100)/length. Synonym: length-breadth index. (05 Mar 2000) |
| pelvic index | The ratio of the conjugate of the pelvic inlet to the transverse diameters of the pelvis: (conjugate of pelvic inlet × 100)/transverse diameter. (05 Mar 2000) |
| cephalo-orbital index | The ratio of the cubic content of the two orbits to that of the cranial cavity multiplied by 100. (05 Mar 2000) |
| cephalorrhachidian index | The figure obtained by multiplying the pressure of the cerebrospinal fluid, after fluid has been withdrawn by spinal puncture, by the quantity of fluid withdrawn and then dividing by the original pressure. Synonym: cephalorrhachidian index. (05 Mar 2000) |
| gnathic index | Relation between the basialveolar (basion to alveolar point) and basinasal (basion to nasion) lengths: (basialveolar length × 100)/basinasal length; the result indicates the degree of projection of the maxilla or upper jaw. Synonym: alveolar index. (05 Mar 2000) |
| cerebral index | The ratio of the transverse to the anteroposterior diameter of the cranial cavity multiplied by 100. (05 Mar 2000) |
| cerebrospinal index | The figure obtained by multiplying the pressure of the cerebrospinal fluid, after fluid has been withdrawn by spinal puncture, by the quantity of fluid withdrawn and then dividing by the original pressure. Synonym: cephalorrhachidian index. (05 Mar 2000) |
| chemotherapeutic index | The ratio of the minimal effective dose of a chemotherapeutic agent to the maximal tolerated dose. Originally used by Ehrlich to express the relative toxicity of a chemotherapeutic agent to a parasite and to its host. (05 Mar 2000) |
| chest index | Anteroposterior diameter of the thorax times 100 divided by the transverse diameter of the thorax. Synonym: chest index. (05 Mar 2000) |