| VO | verbal order; volume overload; voluntary opening |
|---|---|
| Vo | standard volume |
| VO2, | Vo2 volume of oxygen utilization |
| VOC | volatile organic chemical |
| VOCC | voltage-operated calcium channel |
| VOD | veno-occlusive disease |
| VOI | volume of interest |
| vol | volar; volatile; volume; voluntary, volunteer |
| VOM | volt-ohm-milliammeter |
| VON | Victorian Order of Nurses |