| dopp | The Doppler effect is also observed with light and with radiant energy in general. |
| dopp |
| doppelganger | (n) a ghostly double of a living person that haunts its living counterpart |
| doppler | (n) Austrian physicist famous for his discovery of the Doppler effect (1803-1853), Syn. Christian Johann Doppler |
| doppler effect | (n) change in the apparent frequency of a wave as observer and source move toward or away from each other, Syn. Doppler shift |
| doppler radar | (n) radar that uses the Doppler shift to measure velocity |
| Doppelganger | ‖n. [ G. ] A spiritual or ghostly double or counterpart; esp., an apparitional double of a living person; a cowalker. [ Webster 1913 Suppl. ] |
| Dopper | n. [ D. dooper. ] |
| Dopplerite | n. [ Named after the physicist and mathematician Christian |