An electromagnetic pulse (EMP) is an intense burst of electromagnetic (EM) energy caused by an abrupt, rapid acceleration of charged particles, usually electron s. An EMP can contain energy components over a large part of the EM spectrum, from very-low-frequency ( VLF) radio to ultraviolet ( UV) wavelength s. A lightning strike produces a localized EMP that gives rise to large electrical current s in nearby wires.
Definition of italic. 1  1a : of or relating to a type style with characters that slant upward to the right (as in âthese words are italicâ) â compare romanb : of or relating to a style of slanted cursive handwriting developed in the 15th and 16th centuries. 2  2 capitalized : of or relating to ancient Italy, its peoples, or their Indo-European languages.
staff-a rod carried as a symbol. icon - (computer science) a graphic symbol (usually a simple picture) that denotes a program or a command or a data file or a concept in a graphical user interface. marking, mark, marker-a distinguishing symbol; the owner's mark was on all the sheep. identifier-a symbol that establishes the identity of the one bearing it. variable-a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity.