Joints contain bones, cartilage, and a lining called synovium, which produces a lubricating fluid.

"Esteemed sir," he added, wiping at the lubricating fluid on his cheek.

A lubricating fluid, somehow enhanced to relax the desperate tightness of the female channel.

Traditional oil filters are meant to clean the lubricating fluid, but even they have their limits.

The layout enabled the engine and gearbox to be located side by side without sharing lubricating fluid while orienting the cooling fan toward fresh air flow.

Another option is a series of injections of hyaluronate (Synvisc and Hyalgan), intended to replace the lubricating fluid in the knee joint.

Fewer moving parts (about 10 vs over 70), all of which are continuously bathed in clean lubricating fluid.

They secrete a lubricating fluid which reduces friction from muscle movement.