lignin


lig·nin

noun \ˈlig-nən\

Definition of LIGNIN

:  an amorphous polymer related to cellulose that provides rigidity and together with cellulose forms the woody cell walls of plants and the cementing material between them

First Known Use of LIGNIN

1822

lig·nin

noun \ˈlig-nən\   (Medical Dictionary)

Medical Definition of LIGNIN

: an amorphous polymeric substance related to cellulose that together with cellulose forms the woody cell walls of plants and the cementing material between them

lignin

noun    (Concise Encyclopedia)

Complex oxygen-containing organic compound, a mixture of polymers of poorly known structure. After cellulose, it is the most abundant organic material on Earth, making up one-fourth to one-third of the dry weight of wood, where it is concentrated in the cell walls. Removed from wood pulp in the manufacture of paper, it is used as a binder in particleboard and similar products and as a soil conditioner, filler in certain plastics, adhesive ingredient, and raw material for chemicals including dimethyl sulfoxide and vanillin (synthetic vanilla flavouring).

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