1º_ Feminine plain ("flat, smooth, especially a plain terrain"). 2º_ Masonry tool similar to a putty knife, for smoothing surfaces. 3º_ Face of a sheet of paper.
It is the name of a tool used in masonry. It is a tool made of a smooth, handle-handled plank, which is used to flatten layers of cement, plaster or stucco. It usually has a surface that is square or rectangular.
LLANA: Masonry tool.