/loh"keuhs/ , n. , pl. loci /-suy, -kee, -kuy/ , loca /-keuh/ .
1. a place; locality.
2. a center or source, as of activities or power: locus of control.
3. Math. the set of all points, lines, or surfaces that satisfy a given requirement.
4. Genetics. the chromosomal position of a gene as determined by its linear order relative to the other genes on that chromosome.
[ 1525-35; stlocus a place ]