Definition of lignin in English:


Line breaks: lig¦nin
Pronunciation: /ˈlɪgnɪn


[mass noun] Botany
  • A complex organic polymer deposited in the cell walls of many plants, making them rigid and woody.
    More example sentences
    • Callose, lignin and suberin are polymers that can be elicited as plant defences that reinforce cell walls of some species.
    • The hypodermis of all three species has two distinct zones that contain suberin and lignin.
    • Impregnation of endodermal and hypodermal walls with suberin and lignin should reduce the diameter of interfibrillar spaces.


early 19th century: from ligni- 'of wood' + -in1.

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