halftone
half.tone \'haf-.to-n, 'ha.f-\ n 1: HALF STEP 2a: any of the shades of gray between the darkest and the lightest parts of a photgraphic image 2b: a photoengraving made from an image photographed through a screen havin g a lattice of horizontal and vertical lines and then etched so that the details of the image are reproduced in dots - halftone aj