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Latin. n. Marble quarry, stone quarry.


 - adj. Formed in columns; having the form of a column or columns; like the shaft of a column.


 - Columnar epithelium (Anat.), epithelium in which the cells are prismatic in form, and set upright on the surface they cover.


 - Columnar structure (Geol.), a structure consisting of more or less regular columns, usually six-sided, but sometimes with eight or more sides. The columns are often fractured transversely, with a cup joint, showing a concave surface above. This structure is characteristic of certain igneous rocks, as basalt, and is due to contraction in cooling.

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