Final answer:
A point is the geometric entity that indicates an exact location without any size, distinguishing it from a line, which has length, or a ray, which extends indefinitely in one direction from its origin.
Step-by-step explanation:
The term that best describes a geometric entity that indicates a location and has no size is a point. A point serves as a precise location in geometry and it does not extend into any dimension—it has no length, width, or height. Unlike a line, which is described as a point moving through space and can be infinitely extended in both directions, or a ray, which is a straight line that originates at some point and extends infinitely in one direction, a point simply specifies an exact position.