Definition of water dropwort
1
:a plant of the genus Oenanthe;
especially
:a European poisonous herb (O. crocata) having tuberous roots, a yellow juice that stains the skin, yellow flowers, and foliage resembling that of celery — compare water fennel
2
:a leafless herb (Oxypolis canbyi) of the southeastern U.S. with hollow leaflike stems and slender compound umbels of tiny white flowers
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