| melanoscope | <instrument, optics> An instrument containing a combination of coloured glasses such that they transmit only red light, so that objects of other colours, as green leaves, appear black when seen through it. It is used for viewing coloured flames, to detect the presence of potassium, lithium, etc, by the red light which they emit. Origin: Gr, black + -scope. Source: Websters Dictionary (01 Mar 1998) |
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