The Collaborative International Dictionary
Chiaro-oscuro
Chiaroscuro \Chia`ro*scu"ro\, ||Chiaro-oscuro \Chi*a"ro-os*cu"ro\, n. [It., clear dark.]
The arrangement of light and dark parts in a work of art, such as a drawing or painting, whether in monochrome or in color.
The art or practice of so arranging the light and dark parts as to produce a harmonious effect. Cf. Clair-obscur.
Wiktionary
chiaro-oscuro
n. (archaic form of chiaroscuro English)