lignin defined in 1951 yearlignin - lignin;
lignin - Complex aromatic compound, chemistry of which is not fully understood (considered to be a polymer of phenyl propane units), which is deposited in cell walls of sclerenchyma, xylem vessels and tracheids, making them strong and rigid. Forms 25-30 per cent of the wood of trees.
near lignin in Knolik
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