Definitions

1. noun

The outermost layer of cells in a plant embryo, which eventually gives rise to the epidermis of the mature plant.

“During the early stages of plant development, the protoderm plays a crucial role in forming the plant’s outer layer.”

2. noun

A type of stem cell in the embryo of an animal, particularly in vertebrates, that will eventually give rise to the epithelial layer of the skin.

“In embryonic development, the protoderm differentiates into the various layers of the skin.”