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1823, "pertaining to health," from French sanitaire (1812), from Latin sanitas "health," from sanus "healthy; sane" (see sane). In reference to menstrual pads, first attested 1881 (in sanitary towel).
c.1300, "systematic compilation of laws," from Old French code "system of laws, law-book" (13c.), from Latin codex, earlier caudex "book, book of laws," literally "tree trunk," hence, book made up of wooden tablets covered with wax for writing. Meaning "cipher" (the sense in secret code) is from 1808.
1815, from code (n.). Specifically in the computer sense from 1947. Related: Coded; coding.
sanitary san·i·tar·y (sān'ĭ-těr'ē)
Of or relating to health.
Free from elements, such as filth or pathogens, that endanger health; hygienic.
A series of instructions designed to be fed into a computer.