means A durable plaster of lime, sand, and water (or modern cement) applied wet to coat exterior or interior walls in a hard, textured finish.

from From Italian 'stucco,' the word for plaster or crust, which Italy passed along to the rest of Europe during the Renaissance vogue for ornamental wallwork. The Italian term is generally traced back to a Germanic source, possibly related to an old word for 'crust' or 'piece' — a cousin, perhaps, of English 'stick' in the sense of something that adheres. So the name carries its own job description: the stuff that clings to the wall.