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  • NCEH

    National Center for Environmental Health (CDC)

  • NCEH (National Center for Environmental Health)

  • NCG

    Non-Condensable Gas

  • NCHS

    National Center for Health Statistics (CDC)

  • NCHS (National Center for Health Statistics)

  • NCHSTP

    National Center for HIV, STD, and TB Prevention (CDC)

  • NCHSTP (National Center for HIV, STD, and TB Prevention)

  • NCI

    National Cancer Institute

  • NCID

    National Center for Infectious Diseases (CDC)

  • NCID (National Center for Infectious Diseases)

  • NCIPC

    National Center for Injury Prevention and Control (CDC)

  • NCIPC (National Center for Injury Prevention and Control)

  • NCMA

    National Concrete Masonry Association

  • NCTR

    National Center for Toxicological Research

  • NCVHS

    National Committee on Vital Health Statistics

  • NDA

    New Drug Application

  • NDA

    Non-Disclosure Agreement

  • NDC

    National Drug Code

  • NDDS

    Novel Drug Delivery System

  • NDE

    New Drug Entity

  • NDR

    Nondispersive Infrared Analysis

  • NE

    Norepinephrine

  • Near Miss

    An unplanned sequence of events that could have caused harm or loss if conditions were different or were allowed to progress, but actually did not.

  • Nearly Massless Particles

    Particles smaller than 0.5 µm, which typically constitute less than 1% of the total mass of particles typically found on outside air, but represents a large percentage of the total number of particles in a typical sample of air. (Due to the exponential increase in the mass of a particle caused by an increase in the diameter, very small particles typically represent a small fraction of the total mass of particles in an airstream).

  • Nearly Massless Particles

    Particles smaller than 0.5 micron, which typically constitute less than 1% of the total mass of particles typically found on outside air, but represents a large percentage of the total number of particles in a typical sample of air. (Due to the exponential increase in the mass of a particle caused by an increase in the diameter, very small particles typically represent a small fraction of the total mass of particles in an airstream).