the world > space > shape > unevenness > projection or prominence > [noun] > a projecting part > projecting rim or flange (3)
A projecting flat rim, collar, or rib, used to strengthen an object, to guide it, to keep it in place, to facilitate its attachment to another…
A raised ridge on some object, part, or surface. A raised ridge or flange on an otherwise flat or smooth hard surface, esp. one providing resistance…