| mental hygiene | The science and practice of maintaining and restoring mental health; a branch of early twentieth century psychiatry that has become an interdisciplinary field including subspecialties in psychology, nursing, social work, law, and other professions. (05 Mar 2000) |
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| criminal hygiene | An obsolete term for the branch of mental hygiene or penology devoted to the study of the causes and prevention of criminality and the treatment of criminals. (05 Mar 2000) |
| hygiene | The science of health and how to maintain it. A condition or practice which promotes good health. (09 Oct 1997) |
| Simplified Oral Hygiene Index | An index that measures the current oral hygiene status based upon the amount of debris and calculus occurring on six representative tooth surfaces in the mouth; often used in field surveys of periodontal disease. (05 Mar 2000) |
| industrial hygiene | Practices adopted by an industrial concern to minimise occupation-related disease and/or injury. (05 Mar 2000) |
| oral hygiene | The practice of personal hygiene of the mouth. It includes the maintenance of oral cleanliness, tissue tone, and general preservation of oral health. (12 Dec 1998) |
| oral hygiene index | A combination of the debris index and the dental calculus index to determine the status of oral hygiene. (12 Dec 1998) |