Source:http://linkedlifedata.com/resource/umls/id/C0332583
NCI: The hue of that portion of the visible spectrum lying between yellow and blue, evoked in the human observer by radiant energy with wavelengths of approximately 490 to 570 nanometers; any of a group of colors that may vary in lightness and saturation and whose hue is that of the emerald or somewhat less yellow than that of growing grass. (American Heritage Dictionary - Bartelby.com)