Morintannic \Mo`rin*tan"nic\, a. [NL. Morus fustic + E. tannic.] (Chem.) Pertaining to, or designating, a variety of tannic acid extracted from fustic ({Chlorophora tinctoria}, formerly {Maclura tinctoria} and {Morus tinctoria}) as a yellow crystalline substance; -- called also {maclurin}. [1913 Webster]