| Acronym | Meaning |
![](file.png) | NTB | Nonorthogonal Tight-binding |
![](file.png) | NTCF | National Toxics Campaign Fund |
![](file.png) | NTD | Neutron Transmutation Doping |
![](file.png) | NTD | Nuclear Track Detector |
![](file.png) | NTDB | National Trade Databank |
![](file.png) | NTEF | Near Total External Fluorescence |
![](file.png) | NTGS | Air/Superfund National Technical Guidance Study |
![](file.png) | NTI | National Toxics Inventory |
![](file.png) | NTI | Negative Thermal Ionization (for Mass Spectrometry) |
![](file.png) | NTIAC | Nondestructive Testing Information Analysis Center |
![](file.png) | NTIMS | Negative Thermal Ionization Mass Spectrometry |
![](file.png) | NTIS | National Technical Information Service |
![](file.png) | NTN | National Trends Network |
![](file.png) | NTNCWS | Nontransient, Noncommunity Water Supplies |
![](file.png) | NTO | Natural Transition Orbital Method (for Excited States) |
![](file.png) | NTP | National Toxicology Program |
![](file.png) | NTP | Normal Temperature And Pressure |
![](file.png) | NTR | Nontranslated Region |
![](file.png) | NTRM | NIST Traceable Ref. Materials |
![](file.png) | NTRS | National Technology Roadmap For Semiconductors |
![](file.png) | NTS | Nevada Test Site |
![](file.png) | NTS | Nucleus Of The Solitary Tract |
![](file.png) | NTSB | National Transportation Safety Board |
![](file.png) | NTTAA | National Technology Transfer And Advancement Act |
![](file.png) | NTTC | National Technical Transfer Center |
![](file.png) | NTU | Nephelometric Turbidity Unit |
![](file.png) | NTU | Number Of Transfer Units (in Packed Tower Aeration System) |
![](file.png) | NUCEF | Nuclear Fuel Cycle Safety Engineering Research Facility |
![](file.png) | NUR | Nitrate Utilization Rate |
![](file.png) | NURE | National Uranium And Resource Evaluation |
![](file.png) | NURP | Nationwide Urban Runoff Program (USEPA) |
![](file.png) | NURSA | Nuclear Receptor Signaling Atlas |
![](file.png) | NVDOC | Non-volatile Dissolved Organic Carbon |
![](file.png) | NVFEL | National Vehicle And Fuel Emissions Laboratory |
![](file.png) | NVFRAM | Nonvolatile Ferroelectric Random Access Memory |
![](file.png) | NVH | Noise, Vibration, And Harshness |
![](file.png) | NVLAP | National Voluntary Laboratory Accreditation Program |
![](file.png) | NVM | Non-volatile Memory |
![](file.png) | NVP | Newton Variational Principle |
![](file.png) | NVPA | No-virtual-pair Approxn. |
![](file.png) | NVR | Non-volatile Residue |
![](file.png) | NVSM | Nonvolatile Semiconductor Memory |
![](file.png) | NVSS | NRAO VLA Sky Survey |
![](file.png) | NWC | National Water Council (UK) |
![](file.png) | NWEA | National Wood Energy Association |
![](file.png) | NWIS | Nuclear Weapons Identification System |
![](file.png) | NWPA | Nuclear Waste Policy Act |
![](file.png) | NWQMC | National Water Quality Monitoring Council |
![](file.png) | NWR | National Wildlife Refuge |
![](file.png) | NWR | Normotensive Wistar Rat |