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).
For a rare roast: Allow 15 minutes of cooking time for every pound of roast. For example, if you had a 5 pound roast, you would cook your roast for 75 minutes if you wanted it rare. For a medium rare roast: Cook the roast for 20 minutes for every pound. If you were cooking a 5 pound roast, you would cook it for 100 minutes. For a medium roast: Allow 22 minutes of cooking time for every pound. If you were cooking a 5 pound roast, you would cook the meat for 110 minutes. If you are cooking a pork roast, you should allow 20 minutes per pound of meat.