<p><strong>Noun:</strong></p><ul><li>Also cy·a·nid:<ul><li>Chemistry: a salt of hydrocyanic acid, as potassium cyanide, KCN.</li><li>A nitrile, as methyl cyanide, C₂H₃N.</li></ul></li></ul><p><strong>Verb (used with object):</strong></p><ul><li>cy·a·nid·ed, cy·a·nid·ing:<ul><li>To treat with a cyanide, as an ore in order to extract gold.</li></ul></li></ul>