In 1511, leaders in Mecca believed coffee stimulated radical thinking and outlawed the drink. In 1524, the leaders overturned that order, and people could drink coffee again.
HODOGRAPH
Etymology
Noun
hodograph (plural hodographs)
(physics, maths) 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.
Source: Wiktionary
Hod"o*graph, n. Etym: [Gr.graph.] (Math.)
Definition: 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 Unabridged Dictionary 1913 Edition
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