| VTR | variable tandem repeats; videotape recording; vesicular transport system |
|---|---|
| at | no atomic number |
| BHN | bephenium hydroxynaphthoate; Brinell hardness number |
| CAS-REGN | Chemical Abstracts Service Registry Number |
| CT | calcitonin; calf testis; cardiac tamponade; cardiothoracic [ratio]; carotid tracing; carpal tunnel; ... |