Entry 2 senses · 2 variants Webster, 1913 Dermatogen · Der·mat·o·gen · IPA /dɜːˈmætədʒɪn/ n. n. 01 n. Nascent epidermis, or external cuticle of plants in a forming condition. 1. Nascent epidermis, or external cuticle of plants in a forming condition.(Bot.) 02 n. Nascent epidermis, or external cuticle of plants in a forming condition. 1. Nascent epidermis, or external cuticle of plants in a forming condition.(Bot.)