| N:C | nuclear-cytoplasmic ratio |
|---|---|
| NCA | National Certification Agency; National Council on Aging; National Council on Alcoholism; neurocircu... |
| NCI | National Cancer Institute; noncriterion ischemic [animal]; nuclear contour index; nursing care integ... |
| NCR | National Research Council; neutrophil chemotactic response; no carbon required; nuclear/cytoplasmic ... |
| nDNA | nuclear deoxyribonucleic acid |