First Known Use of columnar
Medical Definition of columnar
: of, relating to, being, or composed of tall narrow somewhat cylindrical or prismatic epithelial cells <Barrett's esophagus is the condition in which a metaplastic columnar epithelium replaces the squamous epithelium that normally lines the distal esophagus.—Stuart Jon Spechler, Scientific American Medicine Bulletin, July 1998> <When the development of the teeth is about to commence, the mouth cavity is lined by an epithelium which consists of a layer of low columnar cells.—James Henderson Scott et al., Introduction to Dental Anatomy, 1974>
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