| Answer | Crossword Clue |
|---|---|
| directional | Having a particular direction of motion, progression, or orientation |
| propagating | Transmit (motion, light, sound, etc.) in a particular direction or through a medium |
| propagated | Transmit (motion, light, sound, etc.) in a particular direction or through a medium |
| propagates | Transmit (motion, light, sound, etc.) in a particular direction or through a medium |
| retrograde | having a backward motion or direction; retiring or retreating. |
| directed | (of an angle or vector) having positive or negative direction or orientation assigned |
