| Acronym | Meaning |
![](file.png) | TWSM | Two-way Shape Memory |
![](file.png) | TWTA | Traveling Wave Tube Amplifier |
![](file.png) | TWTDS | Treatment Works Treating Domestic Sewage |
![](file.png) | TWV | Trinkwasserverordnung (German Drinking Water Ordinance) |
![](file.png) | TXRF | Total Reflection X-ray Fluorescence |
![](file.png) | TZ | Triple Zeta (basis Set) |
![](file.png) | TZP | Tetragonal Zirconia Polycrystal |
![](file.png) | U.S.C. | United States Code |
![](file.png) | UA | Unequilibrated Aggregate (interplanetary Dust Particle) |
![](file.png) | UA | United Atom |
![](file.png) | UAM | Urban Airshed Model |
![](file.png) | UAM-IV | Urban Airshed Model Version IV |
![](file.png) | UAMO | Unprojected Alternant Molecular Orbital |
![](file.png) | UAP | Utilization Associated Products |
![](file.png) | UAPS | Utility Acid Precipitation Study |
![](file.png) | UAPSP | Utility Acid Precipitation Study Program |
![](file.png) | UAQI | Uniform Air Quality Index |
![](file.png) | UARP | Upper Atmospheric Research Program |
![](file.png) | UARS | Upper Atmosphere Research Satellite |
![](file.png) | UASB | Upflow Anaerobic Sludge Blanket |
![](file.png) | UASBR | Upflow Anaerobic Sludge Blanket Reactor |
![](file.png) | UATMP | Urban Air Toxics Monitoring Program |
![](file.png) | UBA | Unitarized Born Approxn. |
![](file.png) | UBD | Under-bath Decarburization |
![](file.png) | UBFF | Urey-Bradley Force Field |
![](file.png) | UBM | Under Bump Metallurgy |
![](file.png) | UBT | Urea Breath Test |
![](file.png) | UCA | Unit Cell Approximation [simulation Method] |
![](file.png) | UCAR | University Corporation For Atmospheric Research |
![](file.png) | UCAS-SCF | Unrestricted Complete Active Space Self-consistent Field |
![](file.png) | UCC | Unitary Coupled-cluster |
![](file.png) | UCC(N) | Unitary Coupled-cluster [truncated To Nth Order] |
![](file.png) | UCCD | (spin) Unrestricted Coupled Cluster (with) Double (excitations) |
![](file.png) | UCCSD | (spin) Unrestricted CCSD |
![](file.png) | UCDW | Ultrarelativistic Continuum Distorted Wave |
![](file.png) | UCEPA | Unitary Coupled Electron Pair Approximation |
![](file.png) | UCG | Underground Coal Gasification |
![](file.png) | UCHF | Uncoupled Hartree-Fock |
![](file.png) | UCHFPT | Uncoupled Hartree-Fock Perturbation Theory |
![](file.png) | UCI | Ultrasonic Contact Impedance |
![](file.png) | UCID | Unrestricted CI (with) Single (and) Double (excitations) |
![](file.png) | UCL | Upper Confidence Limit |
![](file.png) | UCM | Unresolved Complex Mixt. |
![](file.png) | UCMP | Unrestricted Compact Model Potential |
![](file.png) | UCMR | Unregulated Contaminant Monitoring Regulation |
![](file.png) | UCP | Uncoupling Protein |
![](file.png) | UCS | Unconfined Compressive Strength |
![](file.png) | UCST | Upper Critical Solution Temperature |
![](file.png) | UCT | University Of Cape Town |
![](file.png) | UDDS | Urban Dynamometer Driving Schedule |