<p><strong>Noun</strong></p><ul><li>(Electricity):<ul><li>The standard unit of quantity of electricity in the International System of Units (SI), equal to the quantity of charge transferred in one second across a conductor in which there is a constant current of one ampere.</li><li>The carbon rod through which current is conducted between the electrode holder and the arc in carbon arc lighting or welding.</li><li>The rod or plate, composed in part of carbon, used in batteries.</li></ul></li></ul>