(ˌ)dərˈmad.əjə̇n, -ˌjen, ˈdərməd.ə- noun
( -s )
Etymology: International Scientific Vocabulary dermat- + -gen
1. : the outer primary meristem of a plant or plant part that according to the histogen theory gives rise to epidermis
2. : the outer apical meristem of a root tip — called also protoderm