a structure in the chloroplast of photosynthesizing cells, usu. one of an interconnected stack, having a pigmented membrane that is the site of photosynthesis. [< German Thylakoid (1961) < Greek thÈ³lakoeidá¸s resembling a bag =thylak(os) sack + -oÄidÄs -oid]
Round or rump roast almost two hours to reach medium rare, 3-pound roast six hours on low or longer. In a crock pot. On the stove top in a Dutch oven around two hours. Extra 15 minutes may be extended for medium or 30 minutes for well done. (source: http://www.ehow.com/way_5260879_long-cook-pound-roast.html).
Season the roast, sear it in hot oil and cook it in a 250 degree Fahrenheit oven for roughly 30 minutes per pound. One of the keys to keeping it tender is to slice it very thin just as you find in a delicatessen. In fact, if you purchase roast beef in a deli, there is a good chance you are getting rump roast.