IPA: /ˌɪntrəˈdɜːr.məl/
KK: /ɪntrəˈdɜrməl/
Relating to something that occurs within or between the layers of the skin.
The doctor gave an intradermal injection to test for allergies.
Intradermal is formed from "intra-" (meaning within) and "derma" (from Greek "derma", meaning skin). The word refers to something that occurs within the skin.
Think of 'intra-' meaning 'within' and 'derma' meaning 'skin' — this helps you remember that intradermal refers to something that happens within the skin.