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).
Kilobyte (KB) is a common measurement unit of digital information (including text, sound, graphic, video, and other sorts of information) that equals to 1000 bytes. In practical information technology, KB is actually equal to 210 bytes, which makes it equal to 1024 bytes.