Definitions for "Half tone"
An intermediate or middle tone in a painting, engraving, photograph, etc.; a middle tint, neither very dark nor very light.
A print obtained by the half-tone photo-engraving process.
the etched plate used to reproduce a half-tone illustration.
A half step.
The intermediate step between a photo and a final art reproduction on a matchcover. This is an industry wide and common printing term, not indigenous to matchcovers.