A specific location (1) on a chromosome, matched to the corresponding position on the other chromosome of a pair, the site of the maternal and paternal alleles that are often considered together as a gene; (2) defined within a paleontological or archaeological site
The locus of something is the place where it happens or the most important area or point with which it is associated. Barcelona is the locus of Spanish industry. loci the place where something is particularly known to exist, or which is the centre of something locus of