You searched for: “periderm
periderm
1. The outer cork layer of a plant that replaces the epidermis of primary tissues. Cells have their walls impregnated with cutin and suberin.
2. The hard outer covering of hydroids and other marine animals; the perisarc.
3. The outermost layer of the epidermis of an embryo or a fetus up to the sixth month of gestation.