| international system of units | A system of physical units in which the fundamental quantities are length, time, mass, electric current, temperature, luminous intensity, and amount of substance, and the corresponding units are the meter, second, kilogram, ampere, kelvin, candela, and mole. The system has been given official status and recommended for universal use by the general conference on weights and measures. (12 Dec 1998) |
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| international unit | The amount of a substance, such as a drug, hormone, vitamin, enzyme, etc., that produces a specific effect as defined by an international body and accepted internationally; e.g., for an enzyme it is umole of product formed (or substrate consumed) per minute. Synonym: unit. (05 Mar 2000) |
| Leiter International Performance Scale | A nonverbal (performance) test for measuring intelligence which contains norms for each age between 2 and 18; originally developed as a method of assessing the comparative intellectual abilities of Caucasian, Chinese, and Japanese children, but now occasionally used for assessing slow learners and those who are blind, deaf, or verbally handicapped. (05 Mar 2000) |
| accidents, occupational | Unforeseen occurrences, especially of an injurious character due to factors involving one's employment. (12 Dec 1998) |
| air pollutants, occupational | Air pollutants found in the work area. They are usually produced by the specific nature of the occupation. (12 Dec 1998) |
| national institute for occupational safety and health | An institute of the centres for disease control and prevention which is responsible for assuring safe and healthful working conditions and for developing standards of safety and health. Research activities are carried out pertinent to these goals. (12 Dec 1998) |
| noise, occupational | Noise present in occupational, industrial, and factory situations. (12 Dec 1998) |
| dermatitis, occupational | A recurrent contact dermatitis caused by substances found in the work place. (12 Dec 1998) |
| injuries, poisonings, and occupational diseases | Disorders representing collectively the results of assault by external forces, rather than by organic or physiologic dysfunction or by pathogens. (12 Dec 1998) |
| occupational deafness | Sensorineural hearing loss due to overexposure to high intensity noise levels. Synonym: boilermaker's deafness, industrial deafness, occupational deafness. (05 Mar 2000) |
| occupational dentistry | The branch of dentistry concerned with maintaining oral health of employees in occupational environments. (12 Dec 1998) |
| occupational disease | A morbid condition resulting from exposure to an agent during the usual performance of one's occupation. Compare: industrial disease. (05 Mar 2000) |
| occupational diseases | Diseases due to factors involved in one's employment. (12 Dec 1998) |
| occupational exposure | The exposure to potentially harmful chemical, physical, or biological agents that occurs as a result of one's occupation. (12 Dec 1998) |
| occupational groups | Members of the various professions (e.g., physicians) or occupations (e.g., police). (12 Dec 1998) |