halftones

noun
  1. 1

    Half the interval between two notes on a scale.

  2. 2

    A picture made by using the process of half-toning.

  3. 3

    An intermediate or middle tone in a painting, engraving, photograph, etc.; a middle tint, neither very dark nor very light.

Synonyms

Source: https://en.wiktionary.org/wiki/halftone, https://en.wiktionary.org/wiki/halftones