Entry 1 sense Webster, 1913 Igasuric · Ig·a·su·ric · IPA 01 a. Pertaining to, or obtained from, nux vomica or St. Ignatius's bean; as, igasuric acid. 1. Pertaining to, or obtained from, nux vomica or St. Ignatius's bean; as, igasuric acid.(Chem.)