Webster Dictionary(0.00 / 0 votes)Rate this definition: a black pigment found in the pigment-bearing cells of the skin (particularly in the skin of the negro), in the epithelial cells of the external layer of the retina (then called fuscin), in the outer layer of the choroid, and elsewhere. Origin: [Gr.
1 Some people prefer to season a wok using the oven. 2  Peanut oil or corn oil are ideal oils for seasoning a wok because they have a high smoke point. 3  Stainless steel or nonstick-coated woks do not need to be seasoned.
The Viscosity Index (VI) is an indication of the oilâs change in viscosity with a change in temperature. Most gas and steam turbine OEMs require a turbine oil with a VI of at least 90, which is met by most turbine oil suppliers.The VI for turbine oils should not vary in-service, because turbine oils typically do not contain VI improvers and therefore do not need to be tested routinely.he Viscosity Index (VI) is an indication of the oilâs change in viscosity with a change in temperature. Most gas and steam turbine OEMs require a turbine oil with a VI of at least 90, which is met by most turbine oil suppliers.