Half tone
Half tone , noun
1.
(Fine Arts) An intermediate or middle tone in a painting, engraving, photograph, etc.; a middle tint, neither very dark nor very light.
2.
(Music) A half step.
3.
A print obtained by the half-tone photo-engraving process.
4.
the etched plate used to reproduce a half-tone illustration.
Also: Half-tone
Half-tone (haf"tōn`) , adjective
Photo-engraving Having, consisting of, or pertaining to, half tones;
Photo-engraving pertaining to or designating plates, processes, or the pictures made by them, in which gradation of tone in the photograph is reproduced by a graduated system of dotted and checkered spots, usually nearly invisible to the unaided eye, produced by the interposition between the camera and the object of a screen. The name alludes to the fact that this process was the first that was practically successful in reproducing the half tones of the photograph.