In severe cases, the viral infection causes a high fever, bleeding into the skin, and necrosis (death) of cells in the kidney and liver. The damage done to the liver from the virus results in severe jaundice which yellows the skin. Hence, the yellow in yellow fever..
filter definition: The definition of a filter is something that separates solids from liquids, or eliminates impurities, or allows only certain things to pass through. (noun) A Brita that you attach to your water faucet to remove impurities from you...
A filter is a device through which a substance is passed when it is being filtered. ...a paper coffee filter. A filter is a device through which sound or light is passed and which blocks or reduces particular sound or light frequencies. You might use a yellow filter to improve the clarity of a hazy horizon. 4.