| Subject | English | German |
| opt. | process of propagation | Ausbreitungsvorgang |
| environ. | propagation process Process by which a disturbance at one point is propagated to another point more remote from the source with no net transport of the material of the medium itself; examples include the motion of electromagnetic waves, sound waves, hydrodynamic waves in liquids, and vibration waves in solids | Ausbreitungsvorgang |
| environ. | propagation process | Ausbreitungsvorgang |