Viscosity
The resistance of a fluid to flow. Viscosity refers to the “stiffness” of the fluid, or its internal friction.
Aviation Maintenance Technician Handbook — Airframe, p. G-38
Also defined in 1 more source
The resistance of a fluid to flow. Viscosity is the stiffness of the fluid, or its internal friction.
Aviation Maintenance Technician Handbook — Powerplant, p. G-30