plaster of Paris (or, now, chalk) mixed with glue and applied to flat or carved surfaces or as bas-reliefs, etc. and then painted, gilded, etc.
Origin of gessoIt, gypsum, chalk from Classical Latin gypsum, gypsum
- A preparation of plaster of Paris and glue used as a base for low relief or as a surface for painting.
- A surface of gesso.
Origin of gessoItalian from Latin gypsum gypsum ; see gypsum .
(usually uncountable, plural gessos)