Definition of the Day

far-red 1: lying in the part of the infrared spectrum farthest from the red - used of radiations with wavelengths between 30 and about 1000 microns 2: lying in the part of the infrared spectrum nearest to the red - used of radiations starting at about .8 micron

(From Webster's Third New International Dictionary Unabridged, 1993, Addenda.)