North American Datum Nicotinamide adenine dinucleotide Naval Ammunition Depot Network Access Device Nanni Diesel National Advertising Division no active disease no apparent distress Not actually done Nadir Aperture Door Namibia Dollar Nanggroe Aceh Darussalam National Armaments Director National Association of the Deaf Network Access Devices Network Access Domain neutrophil actin dysfunction new antigenic determinant Nicotinamide Adénine Dinucléotide Nitric Acid Dehydrate no abnormality detected No Acute Disease no acute distress NODE ADMINISTRATION nothing abnormal detected nuclear accident dosimetry nadolol Namibian dollar National Academy of Design National Appeals Division