Locus
Locus , noun
[Latin, place. Compare Allow, Couch, Lieu, Local.]
1.
A place; a locality.
2.
(Mathematics) The line traced by a point which varies its position according to some determinate law; the surface described by a point or line that moves according to a given law.
Collocations (2)
Plane locus , a locus that is a straight line, or a circle.
Solid locus , a locus that is one of the conic sections.