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A jointed and usually hollow grass stem.
The solid stem of certain monocotyledons, such as the sedges.
(mining engineering)
Fine, refuse coal, screened and separated from larger pieces.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the cylindrical, usually hollow stem of a cereal grass. A culm is somewhat distended at the nodes, that is, at the site of leaf attachment. In some cereal grasses, for example, corn, the stalks are solid. The arrangement of the vascular bundles and mechanical tissues along the periphery of the culm imparts great resilience.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.