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• n  the result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx

• derived function
• derivative
• differential coefficient
• differential

News & Articles

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• Momentum Has No Theoretical Limit
  While it’s true that a positive second derivative — with its mathematical certainty, the epitome of acceleration — can theoretically exist for all time, in practical terms, such a trajectory would become vertical and even bend back on itself at some point. However, even a stable second derivative could attach to a positive first derivative, which itself represents the very essence of momentum.
  Nov. 20, 2013 - Forbes