| STIR | short tau inversion recovery |
|---|---|
| t | Greek lower case letter tau; life [of radioisotope]; relaxation time; shear stress; spectral transmi... |
| Ea | kinetic energy of alpha particles |
| FF | degree of fineness of abrasive particles; fat-free; father factor; fecal frequency; fertility factor... |
| FFF | degree of fineness of abrasive particles; field-flow fractionation; flicker fusion frequency |