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say it: LOH-kuhs
locus is a noun meaning "the scene of any event or action (especially the place of a meeting)". It is pronounced /ˈloʊkəs/ — LOH-kuhs. It carries 3 recorded senses.
the specific site of a particular gene on its chromosome
the set of all points or lines that satisfy or are determined by specific conditions
“the locus of points equidistant from a given point is a circle”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for locus come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.