Entry 1 sense Webster, 1913 Mimotannic · Mi·mo·tan·nic · IPA 01 a. Pertaining to, or designating, a variety of tannin or tannic acid found in Acacia, Mimosa, etc. 1. Pertaining to, or designating, a variety of tannin or tannic acid found in Acacia, Mimosa, etc.(Chem.)