lubricating substance

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a substance capable of reducing friction by making surfaces smooth or slippery
• Syn:
lubricant, lubricator, lube
• Derivationally related forms:
lubricate (for: lubricator), lubricate (for: lubricant)
• Hypernyms:
substance
• Hyponyms:
drilling mud, drilling fluid, motor oil