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Definition of petroleum jelly noun from the Oxford Advanced American Dictionary

 

petroleum jelly

 
(also petrolatum noun
NAmE//ˌpɛtrəˈleɪt̮əm//
 
)
[uncountable]
 
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a soft clear substance obtained from petroleum, used to heal injuries on the skin or to make machine parts move together more smoothly synonym Vaseline™
See the Oxford Advanced Learner's Dictionary entry: petroleum jelly