It can be a feminized form of cornhog (plant), or just a mistake by carniza, cornice, eating, . . .
The correct term is cornice, with s. It is the name of the top of a wall or wall, finisher. It usually has embellishments in moldings, protrusion, cantilever. On a mountain is a ledge on a cliff. Outgoing or edge of a cliff.
corniza is incorrectly written and it should be written as "ledge" being its meaning: See: cornice.
OUTSTANDING CORNIZA:PARTE A BUILDING.CANTILEVER.