Dictionary.net

a complex polymer; the chief non-carbohydrate constituent of wood; binds to cellulose fibers to harden and strengthen cell walls of plants

a complex polymer; the chief non-carbohydrate constituent of wood; binds to cellulose fibers to harden and strengthen cell walls of plants

A substance characterizing wood cells and differing from cellulose in its conduct with certain chemical reagents.

A substance characterizing wood cells and differing from cellulose in its conduct with certain chemical reagents.

The most abundant natural aromatic organic polymer found in all vascular plants. Lignin together with cellulose and hemicellulose are the major cell wall components of the fibers of all wood and grass species. Lignin is composed of coniferyl, p-coumaryl, and sinapyl alcohols in varying ratios in different plant species. (From Merck Index, 11th ed)

Ligneous or woody fibre; the fibrous structure of vegetable substances.

A substance present in cell walls, which is very resistant to chemical reagents. It contains aromatic groups and responds to the lignin reaction.