| rare earth | |
| —n | |
| 1. | any oxide of a lanthanide |
| 2. | another name for lanthanide Also called: rare-earth element |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
rare earth n.
See lanthanide.