achromat (ˈækrəˌmæt) ![]() | |
| —n | |
| 1. | Compare apochromat Also called: achromatic lens a lens designed to bring light of two chosen wavelengths to the same focal point, thus reducing chromatic aberration |
| 2. | a person who has no colour vision at all and can distinguish only black, white, and grey. The condition is very rare |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| the offspring of a zebra and a donkey. |