| Subject | English | German |
| tech. | back taper tooth | Ablaufzahn (Gewindeschneideinrichtung) |
| gen. | back tooth | Backenzahn |
| met., mech.eng. | curved-back tooth | Bogenzahn |
| met., mech.eng. | straight-back tooth | Winkelzahn |
| tech. | tooth back | Zahnruecken |
| tech. | tooth back | Zahnrücken |