splenetic /spləˈnɛtɪk/adjective 2noun 1forms 3 adjective2 •Bad-tempered, irritable, peevish, spiteful, habitually angry.A sect, whose chief devotion lies / In odd perverse antipathies; / […] / More peevish, cross, and splenetick, / Than dog distract, or monkey sick. — 1662 •Related to the spleen.I have already described the general protuberance of the abdomen among the children throughout the Messaria and the Carpas districts, all of whom are more or less affected by splenetic diseases. — 1879 noun1 •(no longer used) A person affected with spleen. formssplenetics · more splenetic · most splenetic