Of or relating to the range of invisible radiation wavelengths from about4 nanometers,on the border of the x-ray region,to about380 nanometers,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