The word "locus" refers to a specific place, position, or location. It is used to describe where something is or the particular area where an event or action takes place. Full definition
Two of the 14 studies did not find any association between CSA and parenting stress and the remaining five studies suggest other variables may affect the relationship between CSA and parenting stress, such as locus of control and current stressors. (link.springer.com)
We detect selection at loci associated with diet, pigmentation and immunity, and two independent episodes of selection on height. (nature.com)
The 52 associated variants roughly double the number of genetic loci for AMD. (massgenomics.org)