- The definition of a cell wall is the protective coating for a plant cell.
An example of a cell wall is the rigid cellulose outside the cell membrane of a plant.
Biol. the nonliving covering or separating wall of a cell; esp., the relatively rigid covering of a plant cell, containing cellulose, hemicellulose, lignin, etc.
The rigid outermost cell layer found in plants and certain algae, bacteria, and fungi but absent from animal cells.
(plural cell walls)
- (cytology) A thick, fairly rigid, layer formed around individual cells of bacteria, Archaea, fungi, plants, and algae (but not animals and other protists which generally have cell membranes without cell walls). The cell wall is external to the cell membrane and serves a structural function helping the cell maintain its shape and protecting the cell from damage.
- Rare spelling of cell wall.