<p><strong>Noun</strong></p><ul><li>Chemistry. A metallic derivative of ammonia in which the −NH₂ group is retained, as potassium amide, KNH₂.</li><li>An organic compound obtained by replacing the −OH group in acids by the −NH₂ group.</li><li>An organic compound formed from ammonia by replacing a hydrogen atom by an acyl group.</li></ul>