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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a gadget; dingus; thingumbob. |
| dichroism (ˈdaɪkrəʊˌɪzəm) | |
| —n | |
| 1. | See also pleochroism Also called: dichromaticism a property of a uniaxial crystal, such as tourmaline, of showing a perceptible difference in colour when viewed along two different axes in transmitted white light |
| 2. | a property of certain solutions as a result of which the wavelength (colour) of the light transmitted depends on the concentration of the solution and the length of the path of the light within the solution |
dichroism di·chro·ism (dī'krō-ĭz'əm)
n.
The property of some solutions of showing different colors at different concentrations.
The property of some crystals of exhibiting two different colors when viewed along different axes.