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Explanation: ostomy appliance - means generaly a pouch attached to an opening made on front side of one's belly, after a surgical procedure resolving problems with one's intestines; e.g. colostomy (see, e.g. http://www.healingwell.com/ibd/library/pbrown2.htm )
In Croatian, the opening is called "stoma", with specific variants:" kolostoma", "ileostoma", etc.; surgical procedure is e.g. "kolostomija", "ileostomija", respectively.
More specific would be "vrechica za stomu" meaning literally "pouch for stoma", "ch" being written as c with a diacritical mark above it, shaped like /.