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sado-masochism

n.

also sadomasochism, 1916, from comb. form of sadism + masochism. Abbreviation S & M first attested 1965. An earlier word for sexualities that focused on violence was algolagnia (1900), Modern Latin, coined in German in 1892 by German doctor and paranormalist Albert von Schrenck-Notzing (1862-1929) from Greek algos "pain" + lagneia "lust."

Online Etymology Dictionary, © 2010 Douglas Harper