<p><strong>Noun:</strong></p><ul><li>any of several plants in the aconite genus <em>Aconitum</em>, including <em>A. lycoctonum</em>, bearing stalks of hood-shaped purplish-blue flowers, the monkshood <em>A. napellus</em>, which yields a poisonous alkaloid used medicinally, and numerous garden varieties in various colors.</li></ul>