| Quadrokopter | quadcopter |
| Quadrocopter | quadcopter |
| Quadratmeter | square meter square metre |
| Quadrofonie | quadraphonic sound |
| Quadrupeder | quadruped |
| Quadratur | quadrature |
| Quadrieren | quadrature |
| quadrieren | square |
| Quadrupede | quadruped |
| Quarkkuchen | cheesecake |
| Quader | cuboid rectangular cuboid rectangular parallelepiped |
| Quadrant | quadrant |
| Quadrat- | square |
| Quadrat | square |
| Quadratkilometer | square kilometre |
| Quadratum | quadrate bone |
| Quadrille | quadrille |
| Quadrizeps | quadriceps |
| Quantenoptik | quantum optics |
| Quarkonium | quarkonium |