(Latin: slippery, smooth)

lube (s) (noun), lubes (pl)
An informal term for lubrication.
lubricant (s) (noun), lubricants (pl)
Any substance; such as, oil, grease, silicone, or graphite that is put on parts of machines that slide or move against each another in order to make them work smoothly and easily: When a lubricant is applied, it is done in order to reduce friction between two interacting surfaces.
lubricate (LOO bri kayt") (verb), lubricates; lubricated; lubricating
1. To apply oil, grease, or other similar substances to engine components in machines, automobiles, etc. so they will slide smoothly and easily against each other: When something is lubricated, it reduces friction and wear on the connecting parts and so they do not wear out so quickly.

Sometimes a person needs to lubricate rusty bolts so they can be unscrewed.

Mechanics who work on cars usually need to lubricate certain engine parts in order to remove old ones and to attach new ones.

Different kinds of machines and engines, from jumbo jets to sewing machines, need to be lubricated in order for them to work properly.

Hyaluronic acid, a viscous slippery substance that lubricates the joints in the body, maintains the shape of the eyeballs, and is a key component of connective tissue, is inside the knees, elbows, fingers, etc. of people and it helps to lubricate and cushion the joints; in fact, hyaluronic acid is a lubricating substance found naturally in all of the joints of the body.

2. Etymology: from Latin lubricatum, "made slippery".
lubricating (adjective), more lubricating, most lubricating
Descriptive of a greasy solution that protects connecting surface joints that are in sliding motions relative to each other and are fully separated by a film of fluid: Lubricating films can help prevent corrosion by protecting surfaces from water and other corrosive substances.
lubrication (s) (noun), lubrications (pl)
A process of either separating surfaces or protecting them in a way to reduce friction, heat, wear and energy consumption: Proper lubrication can be accomplished by using oils, greases, gases or other fluids; so, when people change the oil in their cars or grease a bearing, they should realize that there is more going on than they realize.
lubricator (s) (noun), lubricators (pl)
The application of an agent or component that is used to reduce frictions between groups of at least two mechanical surfaces that come in contact with each other: A lubricator is a person who uses an oil cup or similar device for supplying a substance that is capable of reducing friction by making surfaces in machineries smooth or slippery.

A lubricator furnishes a limited but constant supply of fluid to the moving parts of mechanical devices or various machines.

lubricious (adjective), more lubricious, most lubricious
1. Descriptive of having a slippery or a smooth quality as with oil or a similar substance.
2. Etymology: from Latin lubricus, "slippery".
lubricity (s) (noun), lubricities (pl)
An oily smoothness, slipperiness.
lubricous (adjective), more lubricous, most lubricous
A description of a substance that reduces friction between two surfaces that rub together.
lubrifaction (s) (noun), lubrifactions (pl)
1. The process or act of making something slippery or smooth.
2. Etymology: from Latin lubricus, "smooth" + factus, past participle of facere, "to make".
lubritorium (s) (noun), lubritoria (pl)
A place; such as, a service station, where motor vehicles can be serviced with oil.