gesso

gesso is a   Noun

Definition:

[1] Plaster of Paris, or gypsum, esp. as prepared for use in painting, or in making bas-reliefs and the like; by extension, a plasterlike or pasty material spread upon a surface to fit it for painting or gilding, or a surface so prepared.

[2] A work of art done in gesso. [Obs.]

Synonyms: