<p><strong>Noun</strong></p><ul><li>Any of several plants of the genera <em>Gentiana</em>, <em>Gentianella</em>, and <em>Gentianopsis</em>, having usually blue, or sometimes yellow, white, or red, flowers, as the fringed gentian of North America, or <em>Gentiana lutea</em>, of Europe.</li><li>Compare gentian family.</li><li>Any of various plants resembling the gentian.</li><li>The root of <em>G. lutea</em>, or a preparation of it, used as a tonic.</li></ul>