A "round roast" refers to a piece of meat that is taken from the round section of a cow. It is usually a lean and flavorful cut of meat that can be cooked in various ways, such as by roasting in the oven or slow cooking. Full definition
It isn't specific about what type of beef to use, so we recommend going with bottom round roast as a healthy, lean beef that supplies big time protein with little fat. (bembu.com)