s]
, -ca [-kuh]
. | 1. | a place; locality. |
| 2. | a center or source, as of activities or power: locus of control. |
| 3. | Mathematics. 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. |

plur. loci (loh-seye, loh-keye)
In geometry, the set of all points (and only those points) that satisfy certain conditions; these points form a curve or figure. For example, the locus of all points in space one foot from a given point is a sphere having a radius of one foot and having its center at the given point. The locus of all points in a plane one foot from a given point is a circle having a radius of one foot and having its center at the given point.
locus lo·cus (lō'kəs)
n. pl. lo·ci (-sī', -kē, -kī')
A place; site.
The position that a given gene occupies on a chromosome.
| LOCA low osmolar contrast agent |