/ ˈluːbrɪkənt; NAmE / (also informal lube / luːb; NAmE /) noun
[ U , C ] a substance, for example oil, that you put on surfaces or parts of a machine so that they move easily and smoothly
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WORD ORIGIN
early 19th cent.: from Latin lubricant- making slippery, from the verb lubricare , from lubricus slippery.