any of a group of gummy polysaccharides, intermediate in complexity between sugar and cellulose, that hydrolyze to monosaccharides more readily than cellulose.

Origin of hemicellulose

First recorded in 1890–95; hemi- + cellulose
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hemicellulose

Historical Examples of hemicellulose

  • The hemicellulose of wheat is, therefore, according to the author, pure pentosane.

British Dictionary definitions for hemicellulose



any of a group of plant polysaccharides that occur chiefly in the cell wall
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

hemicellulose in Medicine


[hĕm′ĭ-sĕlyə-lōs′, -lōz′]


Any of several polysaccharides that are more complex than a sugar and less complex than cellulose and found in plant cell walls.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.