| Acronym | Meaning |
![](file.png) | (PI)SDCI | (pi)-electron Singly And Doubly Excited CI |
![](file.png) | (SC)2(CI+PT2) | Self-consistent Size-consistent (CI+second-order Perturbation) |
![](file.png) | (SC)2CI | Self-consistent Size-consistent CI |
![](file.png) | 2DEG | Two-dimensional Electron Gas |
![](file.png) | 2DHG | Two Dimensional Hole Gas |
![](file.png) | 2MASS | Two Micron All-Sky Survey |
![](file.png) | 2PH TDA | Two-particle-hole Tamm-Dancoff Approximation (for Closed-shell |
![](file.png) | 2PPE | Two-photon Photoemission |
![](file.png) | 3A | Alumina Aluminide Alloys |
![](file.png) | 3DAP | Three Dimensional Atom Probe |
![](file.png) | 3DWQM | Chesapeake Bay Three Dimensional Time Variable Water Quality Model |
![](file.png) | 3P | Pollution Prevention Pays |
![](file.png) | 3SR | Self-sustained Sequence Replication |
![](file.png) | 4WM | Four Wave Mixing |
![](file.png) | 6FDA | 2,2'-Bis (3,4-Dicarboxyphenyl) Hexafluoropropane Dianhydride |
![](file.png) | 7-ACA | 7-aminocephalosporanic Acid |
![](file.png) | 7-ADCA | 7-aminodesacetoxycephalosporanic Acid |
![](file.png) | A.I. | Active Ingredient |
![](file.png) | A/C | Activated Carbon |
![](file.png) | A/CNK | [Al2O3/(CaO + Na2O + K2O)] (Shand's Index) |
![](file.png) | A/PI | Ab Initio Perturbed Ion (quantum Clacn. Method) |
![](file.png) | A2LA | American Association For Laboratory Accreditation |
![](file.png) | AA | Aluminum Association |
![](file.png) | AA | Assistance Administration |
![](file.png) | AA | Assistant Administrator |
![](file.png) | AA | Activation Analysis |
![](file.png) | AA | Atomic Absorption |
![](file.png) | AAA | Abdominal Aortic Aneurysm |
![](file.png) | AAAI | American Association For Artificial Intelligence |
![](file.png) | AAAS | American Academy Of Arts And Sciences |
![](file.png) | AAAS | American Association For The Advancement Of Science |
![](file.png) | AABW | Antarctic Bottom Water |
![](file.png) | AACA | Ambient Atmosphere Conditions And Aging |
![](file.png) | AACC | American Association For Clinical Chemistry |
![](file.png) | AACC | American Association Of Cereal Chemists |
![](file.png) | AACE | American Association Of Coast Engineers |
![](file.png) | AACG | American Association For Crystal Growth |
![](file.png) | AACI | Association Of American Cancer Institutes |
![](file.png) | AACR | American Association For Cancer Research |
![](file.png) | AACVD | Aerosol-assisted Chemical Vapor Deposition |
![](file.png) | AAD | Atomic Absorption Detector |
![](file.png) | AADA | Abbreviated Antibiotic Drug Application |
![](file.png) | AADO | Angular (momentum Conservation) Average Dipole Orientation Theory (in Io-mol. Reactions) |
![](file.png) | AAEC | Australian Atomic Energy Commission |
![](file.png) | AAEE | American Academy Of Environmental Engineers |
![](file.png) | AAEM | Advanced Analytical Electron Microscope |
![](file.png) | AAETA | Atomic Spectroscopy With Electrothermal Atomization |
![](file.png) | AAFEB | Anaerobic Attached Film Expanded Bed |
![](file.png) | AAFEGE | Asymptotically Adjusted Free-electron-gas Exchange (potential) |
![](file.png) | AAGP | Aerobic Attached Growth Process |