Source:http://linkedlifedata.com/resource/umls/id/C0043217
MSH: A product of hard secondary xylem composed of CELLULOSE, hemicellulose, and LIGNANS, that is under the bark of trees and shrubs. It is used in construction and as a source of CHARCOAL and many other products.,NCI: The hard, fibrous substance composing most of the stem and branches of a tree or shrub, and lying beneath the bark; the xylem. (dictionary.com),NCI: Fibrous plant material under the bark that is created by lateral cell division from the vascular cambium. Noted for high content cellulose, hemicellulose, and lignin in the cell walls.