Of or relating to the range of invisible radiation wavelengths from about4nanometers, on the border of the x - ray region, to about380nanometers, just beyond the violet in the visible spectrum.

• 紫外光的，紫外线的刚刚超过可见紫光并在X射线区域边上，从大约4毫微米到380毫微米之间的不可视辐射波长的或与之有关的