Learn how to say Epidermoid correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word epidermis:
the outer layer of cells covering an organism, in particular:
Zoology & Anatomy the surface epithelium of the skin of an animal, overlying the dermis.
Botany the outer layer of tissue in a plant, except where it is replaced by periderm.
early 17th century: via late Latin from Greek, from epi ‘upon’ + derma ‘skin’