| BUN | blood urea nitrogen |
|---|---|
| BUN/CR | blood urea nitrogen/creatine ratio |
| CHN | carbon, hydrogen, and nitrogen; child neurology; Chinese [hamster]; community health network; commun... |
| C/N | carbon/nitrogen [ratio]; carrier/ noise [ratio] |
| DN | Deiter's nucleus; dextrose-nitrogen; diabetic neuropathy; dibucaine number; dicrotic notch; dinitroc... |