musculus sphincter ductus pancreatici: the smooth muscle sphincter of the main pancreatic duct
organ: a fully differentiated structural and functional unit in an animal that is specialized for some particular function
order of magnitude: a number assigned to the ratio of two quantities; two quantities are of the same order of magnitude if one is less than 10 times as large as the other; the number of magnitudes that the quantities differ is specified to within a power of 10