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A locus is a set of points which satisfy a particular condition.

Such points usually form a curve or a surface, depending on the context.

Also known as

Some sources refer to a locus merely as a curve.

Also see

  • Results about loci can be found here.

Linguistic Note

The plural of locus is loci, pronounced either loak-ee or loak-eye.

Ian Stewart opines that the word is obsolete.