alimentary tract smear - any of several cytologic smears obtained from different parts of the alimentary tract; obtained by specialized lavage techniques and used mainly to diagnose cancer in those partscytologic smear, cytosmear, smear - a thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscope esophageal smear - alimentary tract smear of material obtained from the esophagus gastric smear - alimentary tract smear of material obtained from the stomach oral smear - alimentary tract smear of material obtained from the mouth |