locus
nounUK /ˈləʊkəs/
US /ˈloʊkəs/
A locus is the exact place where something is.
The locus of the treasure was marked with an X on the map.
OTHER MEANINGS
2. In mathematics, a locus is the set of all points that follow a certain rule.
A circle is the locus of points that are the same distance from a center.
3. In biology, a locus is the specific spot on a chromosome where a gene sits.
Scientists found the gene at a particular locus on chromosome 7.
4. The center or main point of an activity or event.
The library became the locus of learning in the small town.