<p><strong>Noun</strong></p><ul><li>Calories (plural):<ul><li>Thermodynamics.</li><li>Also called gram calorie, small calorie.</li><li>An amount of heat exactly equal to 4.1840 joules.</li><li>Kilocalorie: Cal.</li><li>Physiology: A unit equal to the kilocalorie, used to express the heat output of an organism and the fuel or energy value of food.</li><li>A quantity of food capable of producing such an amount of energy.</li></ul></li></ul>