| Acronym | Meaning |
| HREE | Heavy Rare Earth Element(s) |
| BMA | British Medical Association |
| BCCD | Brueckner Coupled Cluster With Double Excitations |
| FECO | Fringes Of Equal Chromatic Order |
| TAPPI | Technical Association Of The Pulp And Paper Industry |
| CIPW | Cross, Iddings, Pirrson, And Washington (for Geology Terminology) |
| IAM | Integrated Assessment Modeling |
| SWRO | Seawater Reverse Osmosis |
| TDH | Time-dependent Hartree Theory |
| KIE | Kinetic Isotope Effect |