water dropwort n 1: European poisonous herb having tuberous roots, yellow juice that stains the skin, yellow flowers and foliage resembling celery; all parts extremely poisonous [syn: {water dropwort}, {hemlock water dropwort}, {Oenanthe crocata}]
Water dropwort \Wa"ter drop"wort`\ (Bot.) A European poisonous umbelliferous plant ({Enanthe fistulosa}) with large hollow stems and finely divided leaves. [1913 Webster]