The Collaborative International Dictionary
Medullin
Medullin \Me*dul"lin\, n. [Cf. F. m['e]dulline.] (Bot. Chem.) A variety of lignin or cellulose found in the medulla, or pith, of certain plants. Cf. Lignin, and Cellulose.
Wiktionary
medullin
n. (context biochemistry English) A variety of lignin or cellulose found in the medulla, or pith, of certain plants.