chromatic stimulus
stimulus that, under the prevailing conditions of adaptation, gives rise to a chromatic colour
Note 1 to entry: In the colorimetry of object colours, stimuli having values of purity greater than 0 are usually considered to be chromatic stimuli.
Note 2 to entry: This entry was numbered 845-03-07 in IEC 60050-845:1987.
Note 3 to entry: This entry was numbered 17-143 in CIE S 017:2011.