lu·bri·cant

[loo-bri-kuhnt]
noun
1.
a substance, as oil or grease, for lessening friction, especially in the working parts of a mechanism.
adjective
2.
capable of lubricating; used to lubricate.

Origin:
1815–25; < Latin lūbricant- (stem of lūbricāns), present participle of lūbricāre to make slippery. See lubric, -ant

non·lu·bri·cant, noun
un·lu·bri·cant, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
lubricant (ˈluːbrɪkənt) [Click for IPA pronunciation guide]
 
n
1.  a lubricating substance, such as oil
 
adj
2.  serving to lubricate
 
[C19: from Latin lūbricāns, present participle of lūbricāre. See lubricate]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Lubricant is always a great word to know.
So is callithumpian. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Etymonline
Word Origin & History

lubricant
early 19c., from L. lubricantem, prp. of lubricare "to make slippery or smooth," from lubricus "slippery."
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Its giant bunches of red fruits are rich in oil that proved useful in soap and
  later as a lubricant for steam engines.
The lubricant mixes with neither water nor oils, and it barely evaporates.
Water is the lubricant, the grease that makes biochemistry possible.
It is an essential lubricant to meals of this nature.
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