GRISAILLE
grisaille
(noun) chiaroscuro painting or stained glass etc., in shades of grey imitating the effect of relief
Source: WordNet® 3.1
Etymology
Noun
grisaille (countable and uncountable, plural grisailles)
(arts) In painting, a method of working which employs only varying values of gray to create form. Often a preliminary step in a fully colored painting.
A stained-glass window in this style.
Source: Wiktionary
Gri"saille`, n. Etym: [F., from gris gray.]
1. (Fine Arts)
Definition: Decorative painting in gray monochrome; -- used in English
especially for painted glass.
2. A kind of French fancy dress goods. Knight.
Source: Webster’s Unabridged Dictionary 1913 Edition