Definitions

1. noun

A complex organic polymer, composed mainly of phenylpropane units, that is a principal constituent of wood and some other plant materials.

“The chemical composition of lignin in plant cell walls is crucial for understanding the properties of wood.”

2. noun

A type of polymer found in the cell walls of plants, particularly in woody tissues.

“Researchers studied the chemical properties of lignin in tree bark.”

3. noun

A major component of plant cell walls, giving them strength and rigidity.

“The rigid structure of plant cell walls is due to the presence of lignin.”