The word algebra comes from the ninth century Arabic book Hisâb al-Jabr w’al-Muqabala, written by al-Khowarizmi. The title refers to transposing and combining terms, two processes used in solving equations. In Latin translations, the title was shortened to Aljabr, from which we get the world algebra. The author’s name itself made its way into the English language in the form of our word algorithm.
[the book Hisâb al-Jabr w’al-Muqabala, taken from wiki]