| lubricant | | |
| n. (substance) | 1. lube, lubricant, lubricating substance, lubricator | a substance capable of reducing friction by making surfaces smooth or slippery. |
| ~ substance | a particular kind or species of matter with uniform properties.; "shigella is one of the most toxic substances known to man" |
| ~ drilling fluid, drilling mud | a mixture of clays and chemicals and water; pumped down the drill pipe to lubricate and cool the drilling bit and to flush out the cuttings and to strengthen the sides of the hole. |
| ~ motor oil | oil used to lubricate the moving parts of a motor. |
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