An industrial solvent, often containing polyhalogenated hydrocarbons, used to remove grease from mechanical parts(noun)
A machine that accomplishes this task(noun)
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Use "degreaser" in a sentence
"It's not ready until a tight clean patch soaked in degreaser comes out of the barrel without any traces of fouling."
"Do not use soap as it will break the bond between the metal and the oil (soap is a "degreaser" so completely counteracts the chemical bond you are otherwise trying to achieve over time)."
"With both side panels removed, spray the engine and intake area liberally with a good degreaser such as Simple Green or Greased Lightning."