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Definition of Duodenal smear
1. Noun. Alimentary tract smear of material obtained from the duodenum.
Medical Definition of Duodenal smear
1. A group of cytologic specimens containing material from the mouth (oral smear), oesophagus and stomach (gastric smear), duodenum (paraduodenal smear), and colon, obtained by specialised lavage techniques; used principally for the diagnosis of cancer of those areas. (05 Mar 2000)