lubricating oil

Other forms: lubricating oils

Definitions of lubricating oil
  1. noun
    a thick fatty oil (especially one used to lubricate machinery)
    synonyms: grease
    see moresee less
    types:
    axle grease
    a thick heavy grease used to lubricate axles
    type of:
    oil
    a slippery or viscous liquid or liquefiable substance not miscible with water
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