资料来源 : pyDict

卫生学

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Hygienics \Hy`gi*en"ics\, n.
   The science of health; hygiene.

资料来源 : WordNet®

hygienics
     n : the science concerned with the prevention of illness and
         maintenance of health [syn: {hygiene}]