| Dreikantmaßstab | engineer's scale |
| Zeitmaßstab | time scale |
| Dreikammersystem | tricameralism |
| Dreikönigstag | Three Kings' Day |
| Gliedermaßstab | folding rule |
| Dreikönigsfest | Epiphany |
| Dreikönigsstern | Star of Bethlehem |
| Dreikantfeile | three-cornered file |
| Abbildungsmaßstab | reproduction scale |
| Maßstab | rule scale |
| Ionisationsstab | ionization bar ionizing bar |
| Drei-Kammer-System | tricameralism |
| Dreifaltigkeit | triplicity C Trinity |
| Dreitagebart | five o'clock shadow |
| dreitausend | three thousand |
| Drehautomat | drill |
| Drehkondensator | variable capacitor |
| Drehzahlmesser | RPM gauge rev-counter tachometer |
| Dreikaiserjahr | Year of the Three Emperors |
| Dreikampf | triathlon |