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Oct or OCT may refer to:


Biology and medicine

* Optical coherence tomography, an imaging method *
Organic cation transport protein An organic cation transport protein mediates the transport of organic cations across the cell membrane. These proteins are members of the solute carrier family, subfamily 22. This family of proteins can also transport zwitterions and anions, thou ...
, a type of protein * Optimal cutting temperature compound, used in histology * Oncology clinical trial, a clinical trial in cancer research *
Oxytocin challenge test A contraction stress test (CST) is performed near the end of pregnancy (34 weeks' gestation) to determine how well the fetus will cope with the contractions of childbirth. The aim is to induce contractions and monitor the fetus to check for heart ...
, a type of contraction stress test in late stage pregnancy * Obsessive compulsive tendencies, a criterion involved in the diagnosis of obsessive-compulsive disorder


Mathematics

* Octal, abbreviated oct, the base-8 number system * Octahedron, sometimes abbreviated oct, a regular polyhedron * Odd cycle transversal, a concept in graph theory


Science and technology

*
Octave In music, an octave ( la, octavus: eighth) or perfect octave (sometimes called the diapason) is the interval between one musical pitch and another with double its frequency. The octave relationship is a natural phenomenon that has been refer ...
, symbol: oct., a unit of measurement in electronics * Octans, abbreviation: Oct, a constellation * Office of the Chief Technologist, a manager at the NASA Institute for Advanced Concepts * Optical coherence tomography, an imaging method * Olefin conversion technology, a method in industrial chemistry * Office Customisation Tool, available in some versions of Microsoft Office 2007


Chinese places and companies

* Overseas Chinese Town, (narrowly) a theme park or (broadly) an area in Shenzhen ** OCT Tower, a skyscraper in Overseas Chinese Town *
Overseas Chinese Town Limited Shenzhen Overseas Chinese Town Company Limited known as OCT Limited (formerly OCT Holding) is a publicly traded company based in Shenzhen, China. It is a subsidiary of state-owned Overseas Chinese Town Enterprises (or OCT Group). OCT Limited was i ...
, a company * OCT Harbour, a retail development in Shenzhen


Other uses

* Oct., an abbreviation for the month of October *
Ontario Certified Teacher Ontario Certified Teacher (OCT) is the designation of professionals which is granted by the Council of the Ontario College of Teachers to qualified, registered members in good standing. OCT is the designation required of all teachers who teach in ...
, a professional designation *
Orangi Charitable Trust The 'Orangi Pilot Project'' ( ur, ; abbreviated OPP) collectively designates three Pakistani non-governmental organisations working together, having emerged from a socially innovative project carried out in 1980s in the squatter areas of Orangi, ...
, a Pakistani microfinance organisation *
Orion correlation theory The Orion correlation theory is a fringe theory in Egyptology explaining a possible purpose in the arrangement of the Giza pyramid complex. It posits that there is a correlation between the location of the three largest pyramids of the Giza pyra ...
, a fringe theory in Egyptology * Overseas countries and territories, special territories in relation to the European Union * Oxford Classical Texts, a book series * Oklahoma City Thunder, an American basketball team


See also

* * * * OTC (disambiguation) {{disambig