<p><strong>noun</strong></p><ul><li>Also especially British, Chemistry.</li><li>A nonmetallic element that exists in several forms, the ordinary one being a yellow rhombic crystalline solid, and that burns with a blue flame and a suffocating odor: used especially in making gunpowder and matches, in medicine, in vulcanizing rubber, etc.</li><li>Symbol: S</li><li>Atomic number: 16</li><li>Atomic weight: 32.064</li><li>Density: 2.07 at 20° C</li></ul>