Contrafocal

/ˌkɒntrəˈfoʊkəl/ adjective

Definition

In geometry and physics, relating to or positioned at a point that is opposite to or corresponding with a focus point.

Etymology

From 'contra-' (against) + 'focal' (relating to a focus, from Latin 'focus,' fireplace or center point). Describes points that have a reciprocal or opposite focal relationship.

Kelly Says

In the mathematics of conic sections, contrafocal points are equidistant from their respective foci in opposite ways—it's a symmetry that creates beautiful geometric patterns.

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