yard marker(n = noun.artifact) - (football) a marker indicating the yard line;
is a kind of marker
billiard marker, charlestown navy yard, chicken yard, cubic yard, front yard, genetic marker, hen yard, holding yard, magic marker, main yard, marker, marshalling yard, navy yard, new scotland yard, railway yard, rope yard, scotland yard, side yard, square yard, yard, yard bird, yard donkey, yard goods, yard grass, yard line, yard measure, yard sale