1870 - Invert
Queer Term: Invert: Sexual inversion was a term used by late 19th and early 20th century sexologists, to express the inborn reversal of gender traits i.e. taking on the gender role of the opposite sex.
In 1870, in the Archiv für Psychiatrie, Karl Friedrich Otto Westphal, an eminent professor of psychiatry at Berlin Charité – Universitätsmedizin Berlin (one of Europe's largest university hospitals) published a detailed account of a young woman who, from her earliest years, was sexually inverted: she liked to dress as a boy, only cared for boys’ games, and as she grew up was sexually attracted only to women, with whom she formed a series of tender relationships.
Surprisingly the term invert was not confined to medical books. A friend of the sexologist, Havelock Ellis who had published Sexual Inversion (1897) which is thought to be the first English medical textbook on the subject of homosexuality, and a believer in his theory of sexual inversion, Radclyffe Hall gave this theory, fictional expression through her infamous novel The Well of Loneliness (1928). Moreover, Havelock Ellis provided a foreword to the novel in which he consistently used the term invert to refer to its "he-was-a-she" protagonist, Stephen Gordon, who bore a strong resemblance to one of Austrian psychiatrist Richard von Krafft-Ebing's case studies. Thank goodness the term invert is no longer used!