Locus (noun)

1. The specific place or position where something or someone is located or found.
2. A set of all points, lines, or surfaces that satisfy a given condition or define a shape or geometric object.
3. A gene locus is the specific physical location of a gene on a chromosome.

Origin:

Late 16th century. from latin, meaning 'place'.

Examples:

1. The crime scene was at the locus of the murder.
2. In mathematics, the locus of a point moving in a plane is a curve.
3. The locus of the disease-causing gene has been identified.
4. The DNA locus is a specific place within the genetic material of an organism.
5. The locus of the missing person was finally discovered.