单词	hodograph
释义	hodograph /ˈhɒdəɡrɑːf / noun Mathematics A curve the radius vector of which represents in magnitude and direction the velocity of a moving object.Look at hodographs derived from 8 a.m. wind speed and direction data for Flint and Peoria.... In the next two chapters it will reveal to us how to scale the hodographs for elliptical orbits. The hodograph of a simple harmonic motion is shown at the left, with the time dependence displayed. Origin Mid 19th century: from Greek hodos 'way' + -graph.
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