1) Lubricant 2) Lubricating substance 3) Material 4) Stuff 1) Lubricant 2) Oil 
• (n.) A contrivance, as an oil cup, for supplying a lubricant to machinery. • (n.) One who, or that which, lubricates.
A device which adds controlled or metered amounts of lubricant into a pneumatic system.
Lu'bri·ca`tor noun 1. One who, or that which, lubricates. ' Lubricator of the fibers.' Burke. 2. A contrivance, as an oil cup, for supplying a lubricant to machinery. 
Applicators which feed oil to the rail and provide proper lubrication for sliding guide shoes.
a person or thing that lubricates.