stratum basale

English Thesaurus

1. the innermost layer of the epidermis (noun.body)

hypernym	:	stratum,
definition	:	one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock) (noun.location)

part meronym	:	cuticle, epidermis,
definition	:	the outer layer of the skin covering the exterior body surface of vertebrates (noun.body)