half-tone

CIDE DICTIONARY

half-tone, n. 

•  An intermediate or middle tone in a painting, engraving, photograph, etc.; a middle tint, neither very dark nor very light.  [Webster 1913 Suppl.]
•  A half step.  [Webster 1913 Suppl.]
•  A print obtained by the half-tone photo-engraving process.  [PJC]
•  the etched plate used to reproduce a half-tone illustration.  [WordNet 1.5]

half-tone, a. 

 Having, consisting of, or pertaining to, half tones;  [Webster 1913 Suppl.]