From Longman Dictionary of Contemporary Englishlubricantlu‧bri‧cant /ˈluːbrɪkənt/ noun [countable, uncountable] TITEa substance such as oil that you put on surfaces that rub together, especially parts of a machine, in order to make them move smoothly and easily
Examples from the Corpus
lubricant• Daedalus finds all this rather surprising, for water is an extremely bad lubricant.• Water based lubricants smeared on the barrier, next to the vulva, will increase sensation.• It leads to the stimulation of a privately run black economy as its crucial lubricant. 5.• Should I dash out and buy candles along with my favorite flavored lubricant?• Shell bosses were so impressed with his skill that they offered to supply his lubricants and clothing for five years.• That all-important task acts as a social lubricant, minimizing frictions.• It's an age-old problem and nothing that a dab of string lubricant or Vaseline wouldn't cure.• The edges of mirrors can be smoothed with a carborundum stone but using water rather than oil as the lubricant. 