Otto can refer to different things, but based on the search results, it can refer to the following:
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Otto cycle: An idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine, which is the thermodynamic cycle most commonly found in automobile engines. The cycle consists of isentropic compression, heat addition at constant volume, isentropic expansion, and rejection of heat at constant volume. The Otto cycle is named after Nicolaus Otto, who invented the first successful four-stroke cycle engine.
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Otto engine: A large stationary single-cylinder internal combustion four-stroke engine designed by Nicolaus Otto. It was a low-RPM machine and only fired every other stroke. The engine was eventually adopted to run on different fuels, such as petrol, wood gas, coal gas, propane, hydrogen, and benzene.
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Fragrant essential oil: Otto can also refer to a fragrant essential oil, such as from rose petals.
In summary, Otto can refer to the Otto cycle, the Otto engine, or a fragrant essential oil.
