chiaroscuro

1 :  pictorial representation in terms of light and shade without regard to color

2a :  the arrangement or treatment of light and dark parts in a pictorial work of art The artist uses chiaroscuro to create the perception of depth in a two-dimensional work.b :  the interplay or contrast of dissimilar qualities (as of mood or character)

3 :  a 16th century woodcut technique involving the use of several blocks to print different tones of the same color; also :  a print made by this technique

4 :  the interplay of light and shadow on or as if on a surface a spotlight revealing a chiaroscuro of ridges and craters on a mountainside

5 :  the quality of being veiled or partly in shadow