| Robinson index | An index used to calculate heart work load. See: double product. (05 Mar 2000) |
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| Marie-Robinson syndrome | <syndrome> Insomnia and mild melancholia associated with alimentary levulosuria. (05 Mar 2000) |
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| Robinson, Andrew | <person> U.S. Dermatologist, 1845-1924. See: Robinson's disease. (05 Mar 2000) |
| Robinson, Brian | <person> 20th century British cardiologist. See: Robinson index. (05 Mar 2000) |
| Robinson catheter | A straight urethral catheter with two to six holes to facilitate drainage, especially in the presence of blood clots which may occlude one or more openings. (05 Mar 2000) |
| Robinson, Robert | <person> U.S. Orthopedic surgeon, *1914. See: Smith-Robinson operation. (05 Mar 2000) |
| Robinson's disease | Ohbsolete term for hidrocystoma(s) occurring in the skin of the face, especially in the region of the eyes. (05 Mar 2000) |
| Smith-Robinson operation | Interbody spinal fusion through an anterior cervical approach. (05 Mar 2000) |
| absorbancy index | Absorbance (of light) per unit path length (usually the centimeter) and per unit of mass concentration. Compare: molar absorption coefficient. Synonym: absorbancy index, absorptivity, extinction coefficient, specific extinction. (05 Mar 2000) |
| alveolar 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) |
| anaesthetic index | Ratio of the number of units of anaesthetic required for anaesthesia to the number of units of anaesthetic required to produce respiratory or cardiovascular failure. (05 Mar 2000) |
| antitryptic index | An obsolete term for the relative retardation in loss of viscosity of a solution of casein incubated with trypsin, to which a drop of abnormal blood serum (as from a cancerous patient) has been added, compared with that in a similar solution to which normal serum has been added; if the former drips through the tube of the viscosimeter in 100 seconds, and the latter in 104 seconds, the antitryptic index is 4. (05 Mar 2000) |
| Arneth index | An expression based on adding the percentages of polymorphonuclear neutrophils with 1 or 2 lobes in their nuclei, plus one-half the percentage with 3 lobes; the normal value is 60%. See: Arneth formula, Arneth count. (05 Mar 2000) |
| auricular index | Relation of the width to the height of the auricle or pinna: (width of pinna × 100)/length of pinna. (05 Mar 2000) |
| Ayala's index | The cerebrospinal index when 10 ml of cerebrospinal fluid have been removed. Synonym: Ayala's quotient, spinal quotient. (05 Mar 2000) |
| basilar index | Ratio between the basialveolar line and the maximum length of the cranium, according to the formula: (basialveolar line × 100)/length of cranium. Synonym: alveolar index. (05 Mar 2000) |