1906 - Bulldyke > Dyke
Queer Term: Bulldyke: Oxford English Dictionary definition of Bull Dyke = a lesbian, esp. one whose appearance, behaviour, or identity is regarded as masculine. The term "Dyke" (meaning "lesbian") is derived from the word "bulldyke". (Forgive me, I find "Dyke" amusing as, a geologic dike is a flat body of rock that cuts through another type of rock - I am a lezza and... an ex-geologist.)
Though the origin of "bulldyke" is unknown and many theories have been proposed, some of the first references to "bulldyke" appear in American in print.
1906 - Human Sexuality: A Medico-literary Treatise on the Laws, Anomalies, and Relations of Sex by Joseph Richardson Parke, Pg. 309:
"In American homosexual argot, female inverts, or lesbian lovers, are known euphemistically as "bulldykers," whatever that may mean: at least that is their sobriquet in the "Red Light" district of Philadelphia."
1921 - Medical Review of Reviews, "The 'Fairy' and the Lady Lover" by Perry M. Lichtenstein, M.D., pg. 373:
"She stated that she had indulged in the practice of "bull diking," as she termed it. She was a prisoner in one of the reformatories, and there a certain young woman fell in love with her."
1928 - Home to Harlem by Claude McKay, pg. 129:
"Sapphic and Lesbian...beautiful words."
"What is that there Leshbian?"
"...Lovely word, eh?"
"That’s what we calls bulldyker in Harlem," drawled Jake. "Them’s all ugly womens."
"Not all. And that’s a damned ugly name," the waiter said. "Harlem is too savage about some things. Bulldyker," the waiter stressed with a sneer.
The term was indeed very ugly, hurtful, vilifying, derogatory... As time has passed, the term "dyke" has been reappropriated by some out and proud lesbians. Moreover, Dyke Marches have sprung up in cities around the world with thousands upon thousands of lesbian marchers. One of the first Dyke Marches was held on October 17, 1981 by the now-defunct organisation Lesbians Against the Right. 350 women marched the "Dykes in the Streets" through Toronto (Canada) streets to show lesbian power, pride, and visibility.