Source : Webster's Revised Unabridged Dictionary (1913)

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