The word locus (plural loci) is Latin for "place". It can mean:

Positions

• Locus (psychology), in industrial psychology, having an internal or external locus of control
• Locus (genetics), the position of a gene (or other significant sequence) on a chromosome
• Locus (mathematics), the set of points satisfying a particular condition, often forming a curve of some sort
• Locus (medicine), the "place" on the body where a pathogen enters
• Locus (phonetics), the hypothetical starting point of the formant transitions that characterise plosive consonants acoustically
• In the classics, literature or theology, locus (or locus classicus) marks the first appearance of a phrase or the definitive passage that is authoritative for an idea
• Locus (law), in Scots Law, the place which is the location of a crime or incident subject of lawful or legal enquiry
• Loci is a nickname for rapper Ja Rule

Music

• Loci (band), an alt-rock band from Bristol, United Kingdom

Acronyms

• LOCUS (Level of Care Utilization System), a clinical level of care placement tool for psychiatric and addictions services, developed by the American Association of Community Psychiatrists
• LOCI or LO:CI, a fan shorthand for the TV series Law & Order: Criminal Intent

Periodicals

• Locus (magazine), a magazine carrying news about science fiction
  • Locus Award, presented to the winners of Locus magazine's annual readers' poll
• Locus Suspectus, a Canadian contemporary arts magazine
• Locus (art magazine), a Baltimore, Maryland-based art journal showcasing emerging visual artists.

Other

• Locus Computing Corporation developed the LOCUS clustering operating system, as well as the Merge 8086 virtual machine implementation.
• LOCUS Operating System started as a clustering OS research project at UCLA, and was then developed into a commercial product by Locus Computing Corporation in the 1980s
• method of loci, a mnemonic system
• Locus, is a racing computer game set in the future
• Locus (comics), a Marvel Comics Mutant and supervillain
• Locus Plethore, a Canadian supercar

Distinguish from

• locust

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