英和和英

語源

From hodo- +‎ -graph.

名詞

hodograph (plural hodographs)

1. (physics, mathematics) A curve described by the moving extremity of a line whose other end is fixed, this line being constantly parallel to the direction of motion of, and having its length constantly proportional to the velocity of, a point moving in any path; used in investigations respecting central forces.
   • 1847, editorial staff, Knowledge is Power in "Scientific American", series 1, Volume 3, Issue 10, page 74

     The following is Sir W R. Hamilton's theorem of hodographical isochranism: "if two circular hodegraphs having a common chord, which passes through or tends towards a common centre of force, be cut perpendicularly by a third circle, the times of hodographically describing the intercepted arcs will be equal."

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