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lignin Syllabification: lig·nin
Pronunciation: /ˈliɡnən/

Definition of lignin in English:

noun

Botany
A complex organic polymer deposited in the cell walls of many plants, making them rigid and woody.
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.

Origin

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

Definition of lignin in:

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