- the definite boundary or wall that is part of the outer structure of certain cells, as a plant cell.
Origin of cell wall
First recorded in 1840–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for cell wall
Can you distinguish a nucleus and cell-wall in the blood-cells?
These then become surrounded by a cell-wall and form the spores.
Cells may, or may not, be enclosed in an investing coat or "cell-wall."
Each one has its cell-wall and a central darkly stained nucleus.
The cell-wall was regarded as the essential cell-structure, which by its own peculiar properties controlled the cell-processes.
- the outer layer of a cell, esp the structure in plant cells that consists of cellulose, lignin, etc, and gives mechanical support to the cell
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
- The rigid outermost cell layer found in plants and certain algae, bacteria, and fungi but characteristically absent from animal cells.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- The outermost layer of cells in plants, bacteria, fungi, and many algae that gives shape to the cell and protects it from infection. In plants, the cell wall is made up mostly of cellulose, determines tissue texture, and often is crucial to cell function. Compare cell membrane.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
It is the cell walls that give plant stems and wood their stiffness.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.