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.
Virtually all modern multi-weight oils are detergent oils. Detergent oil, cleans the soot of the internal engine parts and suspends the soot particles in the oil. The particles are too small to be trapped by the oil filter and stay in the oil until you change it. These particles are what makes the oil turn darker.