Definition of "splenetic"

A sect, whose chief devotion lies / In odd perverse antipathies; / […] / More peevish, cross, and splenetick, / Than dog distract, or monkey sick.

1662, [Samuel Butler], “[The First Part of Hudibras]”, in Hudibras. The First and Second Parts. […], London: […] John Martyn and Henry Herringman, […], published 1678; republished in A[lfred] R[ayney] Waller, editor, Hudibras: Written in the Time of the Late Wars, Cambridge: University Press, 1905

Horace seems to have purg'd himself from those Splenetick Reflections in those Odes and Epodes, before he undertook the Noble Work of Satires; which were properly so call'd.

1692, John Dryden, “A Discourse Concerning the Original and Progress of Satire,”, in The Satires of Decimus Junius Juvenalis

[…] here were no Gibers, Cenſurers, Backbiters, Pick-pockets, Highwaymen, Houſebreakers, Attorneys, Bawds, Buffoons, Gameſters, Politicians, Wits, ſplenetick tedious Talkers, Controvertiſts, Raviſhers, Murderers, Robbers, Virtuoſo's; […]

1726 October 28, [Jonathan Swift], “The Author’s Oeconomy and Happy Life among the Houyhnhnms. […]”, in Travels into Several Remote Nations of the World. […] [Gulliver’s Travels], volume II, London: […] Benj[amin] Motte, […], part IV (A Voyage to the Houyhnhnms), page 301

Laura was at a loss to account for her cousin’s sulky behaviour, and ignorant in what she had offended him; however, she was not angry in her turn at Pen’s splenetic mood, for she was the most good-natured and forgiving of women, and besides, an exhibition of jealousy on a man’s part is not always disagreeable to a lady.

1848 November – 1850 December, William Makepeace Thackeray, chapter 27, in The History of Pendennis. […], volumes (please specify |volume=I or II), London: Bradbury and Evans, […], published 1849–1850

In fact, Gwendolen, not intending it, but intending the contrary, had offended her hostess, who, though not a splenetic or vindictive woman, had her susceptibilities.

1876, George Eliot [pseudonym; Mary Ann Evans], Daniel Deronda, volumes (please specify |volume=I to IV), Edinburgh, London: William Blackwood and Sons

In 1979 he published Contre le cinéma situationniste, néo-nazi (Against Neo-Nazi Situationist Cinema), a pamphlet on Hurlements and Debord's later films so splenetic that Isou was unable to bring himself to mention Debord by name; […]

1989, Greil Marcus, “The Attack on Charlie Chaplin”, in Lipstick Traces, Faber & Faber, published 2009

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, Sir Samuel White Baker, Cyprus, as I Saw it in 1879