public health

noun
health services to improve and protect community health, especially sanitation, immunization, and preventive medicine.

Origin:
1610–20

public-health, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To public health
American Heritage
Medical Dictionary

public health pub·lic health (pŭb'lĭk)
n.
Abbr. PH, P.H.
The science and practice of protecting and improving the health of a community, as by preventive medicine, health education, control of communicable diseases, application of sanitary measures, and monitoring of environmental hazards.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
He writes often about science, technology, and public health.
Lying in a landfill, a desktop computer can take a toll on public health.
And in those deaths, public health experts hear the distant rumbling of a
  global catastrophe.
The labs have created a public health crisis in many rural areas where the drug
  has taken hold.
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