語源
late Middle English : from Italian, Spanish, and medieval Latin, from Arabic al-jabrthe reunion of broken parts, bone-setting, from jabarareunite, restore. The original sense, the surgical treatment of fractures, probably came via Spanish, in which it survives; the mathematical sense comes from the title of a book, ‘ilm al-jabr wa’l-muk?ābalathe science of restoring what is missing and equating like with like, by the mathematician al-K?wārizmī (see algorithm)