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/ˈɛθiːn/ · noun
(organic chemistry, IUPAC name) The organic chemical compound ethylene. The simplest alkene, a colorless gaseous (at room temperature and pressure) hydrocarbon with the chemical formula C₂H₄.
Use ethene when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Ethene means (organic chemistry, IUPAC name) The organic chemical compound ethylene. The simplest alkene, a colorless gaseous (at room temperature and pressure) hydrocarbon with the chemical formula C₂H₄.
Common synonyms include ethylene, olefiant gas.
The opposite depends on the specific sense.
Use ethene where its definition matches the intended context.
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