HYGIENE
hygiene, hygienics
(noun) the science concerned with the prevention of illness and maintenance of health
hygiene
(noun) a condition promoting sanitary practices; “personal hygiene”
Source: WordNet® 3.1
Etymology
Noun
hygiene (countable and uncountable, plural hygienes)
The science of health, its promotion and preservation.
Those conditions and practices that promote and preserve health.
Cleanliness.
(computing, slang, of a macro) The property of having an expansion that is guaranteed not to cause the accidental capture of identifiers.
Source: Wiktionary
Hy"gi*ene, n. Etym: [F. hygiène. See Hygeia.]
Definition: That department of sanitary science which treats of the
preservation of health, esp. of households and communities; a system
of principles or rules designated for the promotion of health.
Source: Webster’s Unabridged Dictionary 1913 Edition