noun: the extent to which something is delayed or held back
noun: the act of slowing down or falling behind
noun: a decrease in speed
noun: any agent that retards or delays or hinders
Keely
"''I have already shown, to a certain point, the power of this radiation, by breaking a rope that had a resisting strain of over two tons, which was attached to the periphery of a steel disk, twelve inches in diameter, moving at the slow rate of one revolution in two minutes, its molecular structure vitalized with 42,800 vibrations per second. There was no retardation while breaking the rope, and no acceleration when it was broken. This experiment has been repeated scores of times, before scores of visitors.’' ELECTROMAGNETIC RADIATION - Snell
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