👉 A slim fluid, often referred to as a lubricant or a viscous fluid with low viscosity, is a substance that flows easily and smoothly over surfaces. It reduces friction between moving parts, such as in joints, bearings, or within engines, allowing them to move more efficiently and with less wear. Examples include oils, greases, and certain biological fluids like synovial fluid in joints. The low viscosity of these fluids means they can easily fill small spaces and maintain a thin layer between surfaces, enhancing performance and longevity in mechanical systems.
