Entry 1 sense Webster, 1913 Lieno-intestinal /(lī̇*ē`nō̇-ĭn*tĕs"tĭ*nal)/ · Li·e·no-in·tes·ti·nal · IPA 01 a. Of or pertaining to the spleen and intestine; as, the lieno-intestinal vein of the frog. 1. Of or pertaining to the spleen and intestine; as, the lieno-intestinal vein of the frog.(Anat.)