gastric smear: alimentary tract smear of material obtained from the stomach
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 parts
test-tube baby: a baby conceived by fertilization that occurs outside the mother's body; the woman's ova are removed and mixed with sperm in a culture medium - if fertilization occurs the blastocyte is implanted in the woman's uterus