While that is right, “divider” or “divider line” are common as well, and easier to search for. Try a search for “rule page layout” or “rule typography” or “rule

While that is right, “divider” or “divider line” are common as well, and easier to search for. Try a search for “rule page layout” or “rule typography” or “rule css”. Admittedly, we already have <hr> and <table rules="…">.