| NID | a port in central Norway on Trondheim Fjord |
|---|---|
| NID | (embryology) the organic process whereby a fertilized egg becomes implanted in the lining of the uterus of placental mammals |
| NID | mild form of diabetes mellitus that develops gradually in adults |
| NID | (of birds) remaining in the nest for a time after hatching |
| NID | (of birds) leaving the nest shortly after hatching |
| NID | type genus of the Nidulariaceae |
| NID | bird's-nest fungi |
| NID | small order of basidiomycetous fungi comprising families Nidulariaceae and Sphaerobolaceae |
| NID | a nest in which spiders or insects deposit their eggs |
| NID | a central point or locus of an infection in an organism |