n. & v.
n. 1 colouring-matter used as paint or dye, usu. as an insoluble suspension. 2 the natural colouring-matter of animal or plant tissue, e.g. chlorophyll, haemoglobin.
v.tr. colour with or as if with pigment. pigmental adj. pigmentary adj.
[ ME f. L pigmentum f. pingere paint ]