derivative vs fountain

derivative

noun
  • Something derived. 

  • A financial instrument whose value depends on the valuation of an underlying asset; such as a warrant, an option etc. 

  • A word that derives from another one. 

  • The value of such a derived function for a given value of its independent variable: the rate of change of a function at a point in its domain. 

  • The linear operator that maps functions to their derived functions, usually written D; the simplest differential operator. 

  • Any of several related generalizations of the derivative: the directional derivative, partial derivative, Fréchet derivative, functional derivative, etc. 

  • A chemical derived from another. 

  • The derived function of f(x): the function giving the instantaneous rate of change of f; equivalently, the function giving the slope of the line tangent to the graph of f. Written f'(x) or (df)/(dx) in Leibniz's notation, ̇f(x) in Newton's notation (the latter used particularly when the independent variable is time). 

adj
  • Having a value that depends on an underlying asset of variable value. 

  • Lacking originality. 

  • Imitative of the work of someone else. 

  • Obtained by derivation; not radical, original, or fundamental. 

  • Referring to a work, such as a translation or adaptation, based on another work that may be subject to copyright restrictions. 

fountain

noun
  • A source or origin of a flow (e.g., of favors or knowledge). 

  • An artificial, usually ornamental, water feature (usually in a garden or public place) consisting of one or more streams of water originating from a statue or other structure. 

  • A natural source of water; a spring. 

  • A reservoir from which liquid can be drawn. 

  • A juggling pattern typically done with an even number of props where each prop is caught by the same hand that throws it. 

  • A roundel barry wavy argent and azure. 

  • A ground-based firework that projects sparks similar to a water fountain. 

  • Anything that resembles a fountain in operation. 

  • The structure from which an artificial fountain can issue. 

  • A drink poured from a soda fountain, or the cup it is poured into. 

  • A soda fountain. 

verb
  • To flow or gush as if from a fountain. 

How often have the words derivative and fountain occurred in a corpus of books? (source: Google Ngram Viewer )