What is "suberin"

Suberin \Su"ber*in\, n. [L. suber the cork tree: cf. F. sub['e]rine.] (Bot.) A material found in the cell walls of cork. It is a modification of lignin.

n. A waxy material found in the cell walls of cork and similar plants

Suberin is a waterproofing waxy substance found in higher plants. Suberin is a main constituent of cork, and is named after the cork oak, Quercus suber. Its main function is as a barrier to movement of water and solutes.