| Subject | English | French |
| radiat. | ionization coefficient | constante d'ionisation (for ionization by electrons in a gas) |
| nucl.phys., radiat. | ionization coefficient | coefficient de Townsend (for ionization by electrons in a gas) |
| el. | ionization coefficient | coefficient d'ionisation |
| phys. | ionization coefficient | ionisation linéique |
| radiat. | ionization coefficient | coefficient d'ionisation (for ionization by electrons in a gas, de Townsend) |
| earth.sc., chem. | specific ionization coefficient | coefficient d'ionisation |
| earth.sc., chem. | specific ionization coefficient | ionisation linéique |
| antenn. | specific ionization coefficient | coefficient spécifique d'ionisation |
| radiat. | surface ionization coefficient | coefficient d'ionisation superficielle |
| radiat. | volume ionization coefficient | coefficient d'ionisation volumétrique |