a mixture of plaster (= a substance that becomes hard and smooth as it dries) and glue, used in painting, sculpture, and as a base for decorating wood

Each canvas was layered with two coats of gesso and painted with watered acrylic. 每块画布用石膏粉打了两层底，上面用水溶丙烯颜料作画。

It's a male torso done in pencil on white gesso. 这是用铅笔画在白色石膏底子上的男性躯干。

Many antique looking-glass frames are made of wood with gilded gesso mouldings. 许多古董镜子的边框都是木制的，嵌有涂金的石膏线脚。