(noun) Uneven print density or uneven color A defect in matrix color printing because of a lack of dot placement accuracy or variable dot density Most readily apparent in the areas of solid printing
a leaf symptom in which small but numerous areas of discolouration, commonly chlorotic irregularly shaped and without sharply defined boundaries, stand out against a background of different tint, the pattern being unrelated to the vein network; cf blotch, mosaic Irregular, diffuse patterns of chlorotic areas interspersed with normal green leaf tissue An irregular pattern of light and dark areas