Hypertext Webster Gateway: "columnar"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Columnar \Co*lum"*nar\, a. [L. columnaris, fr. columna.]
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.
From WordNet (r) 1.7 (wn)
columnar
adj 1: having the form of a column; "trees with columned trunks";
"columnar forms"; "a columnlike tree trunk" [syn: {columniform},
{columnlike}]
2: characterized by columns; "columnar construction"
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