| Subject | English | German |
| gen. | Gen-X | Generation X |
| biol. | lethal gen | letales Gen (synonymous with lethal factor or a special lethal factor) |
| biol. | lethal gen | Letalgen (synonymous with lethal factor or a special lethal factor) |
| biol. | lethal gen | Letalfaktor (synonymous with lethal factor or a special lethal factor) |
| abbr. | Lt.-Gen. | lieutenant-general |
| gen. | standby gen sets | Notstromaggregate |