Do diesel engines need spark plugs to ignite the fuel?

Do diesel engines need spark plugs to ignite the fuel?
Diesel engines use heat and compression to ignite fuel. Although not needed in more modern diesel's many had glow plugs in a similar placement that is used to add the required heat for starting, but are not needed once at temperature. With higher injection pressures allowing a finer mist of fuel, thus requiring less heat and compression, glow plugs have largely been eliminated (but still have other heaters for cold weather starts.)