The term used to describe the equidistance from a given directrix and focus is: C. a locus of points called a parabola.
What is a Parabola?
A parabola can be defined as a curve on a plane where any given point is at equal distance from the focus (fixed point), and from a directrix (fixed straight line).
Thus, we can conclude that what is a locus of points called a parabola is equidistant from a given directrix and focus.
Learn more about a parabola on:
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