Botany. A viscid substance, consisting of cellular tissue, lying immediately under the bark of exogens, in which the annual growth of the wood and…

Botany. = periderm, n. 1. rare.

Botany. Originally: the corky layer of a plant stem. Later: an outer protective layer comprising phellem, phellogen, and phelloderm, which develops…

The living tissue beneath the bark of a cork oak. Obsolete. rare.

The innermost layer of the periderm in some plants, composed of parenchymatous cells.

The layer of meristematic cells from which phellem is formed; the cork cambium.

Botany and Chemistry. Originally: cork; the outer bark or periderm of the cork oak. In later use: a waxy material forming the outer layer of the…