Dictionary (n.) A mild cathartic oil, expressed or extracted from the seeds of the Ricinus communis, or Palma Christi. When fresh the oil is inodorous and insipid.Thesaurus agar aloes aperient bran calomel carminative cascara castor oil cathartic colocynth diuretic magnesia mercurous chloride mineral oil mineral water physic purgative purge senna |