Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A perennial North American herb (Oxypolis rigidior) in the parsley family, having pinnately compound leaves and umbels of small white flowers.
  • noun Any of several related plants, such as the water hemlock.

from The Century Dictionary.

  • noun A popular name of the Cicuta virosa, or water-hemlock: so named from its supposed injurious effect upon cows. See Cicuta.
  • noun An American umbelliferous swamp-plant, Oxypolis rigidior, ranging from New York to Florida and westward to Minnesota and Louisiana, supposed to be poisonous to cattle. Also called hemlock-dropwort: and water-dropwort. See cut in middle column.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Bot.) A poisonous umbelliferous plant; in England, the Cicuta virosa; in the United States, the Cicuta maculata and the Archemora rigida. See water hemlock.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Any of several related poisonous plants of the genus Cicuta; especially the water hemlock

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