Relating to or involving fluxion; pertaining to flowing or to mathematical rates of change.
From 'fluxion' + suffix '-al' (relating to). Developed in 17th-century mathematics by Isaac Newton and his followers to describe calculus concepts.
Newton's 'fluxional calculus' was so visionary that mathematicians debated his methods for 100+ years—until Leibniz's clearer notation finally made calculus accessible to everyone.
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