2. pertaining to or emanating from focus. focal distance. see focal-film distance. focal length. the distance between the lens and an object from which all rays of light are brought to a focus. focal liver disease. widely disseminated micro-abscesses or abscesses, migration paths of helminth larvae.. pertaining to or emanating from focus. focal distance. see focal-film distance. focal length. the distance between the lens and an object from which all rays of light are brought to a focus. focal liver disease. widely disseminated micro-abscesses or abscesses, migration paths of helminth larvae.
The kilogram or kilogramme (SI unit symbol: kg) is the base unit of mass in the International System of Units (SI) (the Metric system) and is defined as being equal to the mass of the International Prototype of the Kilogram (IPK, also known as Le Grand K or Big K).
Description: The kilogram is the base unit of mass in the International (SI) System of Units, and is accepted on a day-to-day basis as a unit of weight (the gravitational force acting on any given object). The kilogram is almost exactly equal to the mass of one litre of water.Definition: The kg is defined as being equal to the mass of the International Prototype of the Kilogram (IPK), a block of platinum-iridium alloy manufactured in 1889 and stored at the International Bureau of Weights and Measures in Sevres, SÃ¨vres. francehe kg is defined as being equal to the mass of the International Prototype of the Kilogram (IPK), a block of platinum-iridium alloy manufactured in 1889 and stored at the International Bureau of Weights and Measures in Sevres, SÃ¨vres. france