roughcast

A coarse plaster of lime, shells, and pebbles used for outside wall surfaces.

A rough preliminary model or form.

To plaster (a wall, for example) with roughcast.

To shape or work into a rough or preliminary form.

To form roughly or crudely; compose or shape in a rudimental manner; block out in the rough: as, to rough-cast a model; to rough-cast a story or an essay.

To cover with a coarse semi-fluid plaster by casting or throwing it: as, to rough-cast a wall. See the noun.

A kind of plastering for an external wall, composed of an almost fluid mixture of clean gravel and lime, dashed on the wall, to which it adheres.

To form in its first rudiments, without revision, correction, or polish.

To mold without nicety or elegance; to form with asperities and inequalities.

To plaster with a mixture of lime and shells or pebbles.