hodograph's

hodograph

[hod-uh-graf, -grahf]
noun Mathematics, Mechanics.
the figure described by the extremity of a vector that has a fixed origin and a position vector equal to the velocity of a moving particle.

Origin:
1840–50; < Greek hod(ós) way + -o- + -graph

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hodograph (ˈhɒdəˌɡrɑːf, -ɡræf)
 
n
a curve of which the radius vector represents the velocity of a moving particle
 
[C19: from Greek hodos way + -graph]
 
hodo'graphic
 
adj

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