Any lubricant used during human sexual activity to reduce friction between body parts, or between body parts and other objects.

plural of personal lubricant

A food, beverage, drug or activity that helps people feel more comfortable in social occasions.

plural of lubrication payment

plural of social lubricant

plural of flange lubricator

(rail transport) a device installed in order to reduce wear to both wheel flanges and the rails in the railway track.

plural of lubricating oil

An oil for lubrication of engines and other components.