hodograph
Noun
Meaning
A curve described by the moving extremity of a line the other end of which 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.
Source: Webster's dictionarySynonyms
line
way
course
track
route
path
orbit
curve
arc
flight path
trajectory
streamline
flowchart
flow diagram
flow graph
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