“The historical associations of the word algebra almost substantiate the sordid character of the subject. The word comes from the title of a book written by… Al Khowarizmi. In this title, al-jebr w' almuqabala, the word al-jebr meant transposing a quantity from one side of an equation to another and muqabala meant simplification of the resulting expressions. Figuratively, al-jebr meant restoring the balance of an equation… When the Moors reached Spain… algebrista… came to mean a bonesetter… and signs reading Algebrista y Sangrador (bonesetter and bloodletter) were found over Spanish barber shops. Thus it might be said that there is a good historical basis for the fact that the word algebra stirs up disagreeable thoughts.”

—  Morris Kline

Source: Mathematics and the Physical World (1959), p. 69

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Morris Kline 42
American mathematician 1908–1992

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