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. |

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.
| locus (lō'kəs) Pronunciation Key
Plural loci (lō'sī', -kē, -kī')
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| LOCA low osmolar contrast agent |