IPA: /ˌɛpɪˈdɜːrmɔɪd/
KK: /ˌɛpɪˈdɜrmɔɪd/
Relating to or resembling the outer layer of skin cells in an organism.
The doctor explained that the growth was an epidermoid cyst, which is a type of benign tumor.
Epidermoid → It is formed from "epi-" (meaning upon or over) and "derma" (from Greek, meaning skin) and the suffix "-oid" (meaning resembling or like). The word "epidermoid" refers to something that resembles the outer layer of skin.
Think of something that is 'upon' ('epi-') the 'skin' ('derma') and resembles it — that's what epidermoid means.