Entry 1 sense Webster, 1913 Splanchnology · Splanch·nol·o·gy · IPA /splæŋkˈnɒləd͡ʒi/ 01 n. That part of anatomy which treats of the viscera; also, a treatise on the viscera. 1. That part of anatomy which treats of the viscera; also, a treatise on the viscera.