Definitions

1. noun

a layer of dead cells, especially on the bark of a tree, that serves as a protective barrier against pathogens, insects, and environmental stress.

“The peridermis of the oak tree helped it survive the harsh winter conditions.”

2. noun

the outermost layer of cells on a plant stem or root, especially one that has developed from the cortical layer.

“The peridermis of the potato plant is a key factor in its ability to grow underground.”