n. middle-tone, shade or value between dark and light (Art); technique in which shadows are reproduced as tiny closely spaced dots (Printing); print made using this technique

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Noun
1. a print obtained from photoengraving
(hypernym) engraving
2. an engraving used to reproduce an illustration
(synonym) halftone engraving, photoengraving
(hypernym) engraving

Any photomechanical printing surface or the impression therefrom in which detail and tone values are represented by a series of evenly spaced dots in varying size and shape, varying in direct proportion to the intensity of tones they represent. [JP1]

A picture in which the gradations of light are obtained by the relative darkness and density of tiny dots produced by photographing the subject through a fine screen.