<p><strong>Noun</strong></p><ul><li>Any of various plants whose roots have been regarded as a remedy for snakebites, such as the herb <em>Aristolochia serpentaria</em> (Virginia snakeroot), having a medicinal rhizome and rootlets.</li><li>The white-flowered <em>Polygala senega</em> (Seneca snakeroot), having a medicinal root.</li><li>The root or rhizome of such a plant.</li><li>The North American bugbane.</li><li>A white eupatorium, <em>Eupatorium rugosum</em>.</li><li>A plant, <em>Rauwolfia serpentina</em> (or <em>Rauvolfia serpentina</em>), whose roots are the source of reserpine and other drugs.</li></ul>