SPLENETIC Meaning of SPLENETIC in English [sple.net.ic] adj [LL spleneticus, fr. L splen spleen] (1697) 1 archaic: given to melancholy 2: marked by bad temper, malevolence, or spite -- splenetic n -- sple.net.i.cal.ly adv Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012