noun, plural san·a·to·ri·ums, san·a·to·ri·a [san-uhtawr-ee-uh, –tohr-] /ˌsæn əˈtɔr i ə, -ˈtoʊr-/.

  1. a hospital for the treatment of chronic diseases, as tuberculosis or various nervous or mental disorders.
  2. sanitarium.

noun plural -riums or -ria (-rɪə)

  1. an institution for the medical care and recuperation of persons who are chronically ill
  2. a health resort
  3. British a room in a boarding school where sick pupils may be treated in isolation

n.1839, Modern Latin, noun use of neuter of Late Latin adjective sanitorius “health-giving,” from Latin sanat-, past participle stem of sanare “to heal,” from sanus “well, healthy, sane” (see sane). Latin sanare is the source of Italian sanare, Spanish sanar. n. pl. san•a•to•ri•ums

  1. An institution for the treatment of chronic diseases or for medically supervised recuperation.
  2. A resort for improvement or maintenance of health, especially for convalescents.sanitarium
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