Definitions

1. noun

the state or property of being thick and viscous; the property of a fluid that opposes the flow of other fluids

“The muscosity of the paint made it difficult to mix with water.”

2. noun

the measure of a fluid’s resistance to flow, especially in the form of a numerical value or unit (e.g. Poiseuille number)

“The muscosity of the engine oil was measured to ensure optimal performance.”