rhizoverbBeta
DictionarylubricantFriction-reducing substance
noun

lubricant

LOO-brih-kuhnt/ˈluːbrɪkənt/

A substance that reduces friction between surfaces.

The oil forms a thin lubricant between the contacting gear teeth.

Close-up of amber lubricating oil dripping from an oil-can spout into the contact point of two meshing metal gears, with a thin glossy oil film visible on their contacting teeth.
Etymology
lubricLatinslippery, easily moved
+antLatinpresent-participle ending

The 'slippery' root underlies a participle meaning 'making slippery or smooth.' The noun probably developed from the adjective 'reducing friction,' naming a substance by what it does.

In context

Park Tool15:21
lubricant to where the nipple and the rim meet this helps reduce friction and will make tensioning and future adjustments easier
How To Build A Bicycle Wheel

More examples

  • Apply lubricant to the hinge to stop the squeaking.
  • This machine requires a lubricant that withstands high temperatures.
  • Some lubricants can damage rubber seals.

Forms

lubricant · lubricants

lubricate verb — Reduce friction by applying a substance.

lubrication noun — The application of a substance to reduce friction.

Similar words

oil
A liquid lubricant, rather than a grease or solid.
grease
A thick lubricant that stays in place better than oil.