Entry 1 sense Webster, 1913 Mesodermal /mĕzˌ-əd-ẽrm'-əl/ · Mes·o·der·mal · IPA /mˌɛzədˈɜrməl/ 01 a. Pertaining to, or derived from, the mesoderm; as, mesodermal tissues. 1. Pertaining to, or derived from, the mesoderm; as, mesodermal tissues.(Biol.)