Sclerogen

Scler'o·gen noun [ Greek sklhro`s hard + -gen .] (Botany) The thickening matter of woody cells; lignin.
Found on http://www.encyclo.co.uk/webster/S/33

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Sclerogen

• (n.) The thickening matter of woody cells; lignin.
Found on http://thinkexist.com/dictionary/meaning/sclerogen/

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