medullin Chem.
(mɪˈdʌlɪn)
[Used in German by John (1814); f. L. medulla: see medulla and -in.]
A form of lignin derived from the pith of certain plants, esp. the sunflower.
| 1817 T. Thomson Chem. (ed. 5) IV. 182 Of Medullin. This is the name given by Dr. John to the pith of the sun⁓flower, &c. 1830 Lindley Nat. Syst. Bot. 200. |