NIH

from WordNet (r) 3.0 (2006)

NIH
    n 1: an agency in the Department of Health and Human Services
         whose mission is to employ science in the pursuit of
         knowledge to improve human health; is the principal
         biomedical research agency of the federal government [syn:
         {National Institutes of Health}, {NIH}]

from The Free On-line Dictionary of Computing (8 July 2008)

NIH

   The United States National Institutes of Health.