jejunostomy (d??d?u??n?st?m?) n, pl -tomies (Medicine) the surgical formation of an opening from the jejunum to the surface of the body, through which food may be introducedCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014