| Acronym | Meaning |
| VSM | Vascular Smooth Muscle |
| VSM | Vibrating Sample Magnetometer |
| VSMC | Vascular Smooth Muscle Cell |
| VSMOW | Vienna Standard Mean Ocean Water |
| VSP | Vertical Seismic Profile |
| VSQG | Very Small Quantity Generator |
| VSS | Volatile Suspended Solids |
| VSSP | Viscous Suspension Spinning Process |
| VSTA | Virus-Serum-Toxin Act |
| VSTEP | Vertical-to-surface Transmission Electrophotonic Device |
| VSV | Vesicular Stomatitis Virus |
| VSWIR | Very Short Wavelength IR |
| VSWR | Voltage Standing Wave Ratio |
| VTA | Ventral Tegmental Area |
| VTE | Venous Thromboembolism |
| VTE | Vertival Tube Exchanger |
| VTR | Vertical Tube Reactor |
| VTST | Variational Transition-state Theory |
| VTZ | Valence Triple Zeta (basis Set) |
| VU-CC | Valence Universal-coupled Cluster |
| VU-CCSD/R | Valence Universal-coupled Cluster (with) Single (and) Double (excitations) (r = Radial Components Of The Cluster Amplitudes) |
| VU-LCC | Valence-universal-linear Coupled Cluster |
| VUV | Vacuum Ultraviolet |
| VVHAP | Very Volatile Hazardous Air Pollutant |
| VWN | Vosko-Wilk-Nusair (model Potential In Quantum Calcns.) |
| VX | O-ethyl-S-2-diisopropylaminoethyl Methylphosphonothiolate |
| VZV | Varicella-zoster Virus |
| WAD | Weak And Dissociable Or Weak Acid Dissociable |
| WADR | Waste Acid Detoxification And Reclamation |
| WALTZ | Wonderful Alternating Phase Technique For Zero Residual Splittings |
| WAMMAS | Waste Minimization Management Advisory System |
| WAN | Wide Area Network |
| WAND | Waste Acceptance For Nonradioactive Disposal |
| WAND | Wide Angle Neutron Diffraction |
| WANG | West Australian Natural Gas |
| WANO | World Association Of Nuclear Operators |
| WAO | Wannier Atomic Orbital |
| WAO | Wet Air Oxidation |
| WAP | Wireless Application Protocol |
| WAP | Waste Analysis Plan |
| WAP | Whey Acidic Protein |
| WAPS | Waste Acceptance Preliminary Specification |
| WARMF | Watershed Anal. Risk Management Framework |
| WAS | Whole Air Sampler |
| WAS | Waste Activated Sludge |
| WASP | Wiskott-Aldrich Syndrome Protein |
| WASP | Workplace Analysis Scheme For Proficiency |
| WASP4 | Water Analysis Simulation Program |
| WAT | White Adipose Tissue |
| WATCH | Working Group On Assessment Of Toxic Chemicals |