Definition of "water hemlock" []

• Any of several poisonous, heavy-scented, perennial herbs of the genus Cicuta, especially C. maculata, of marshy areas in eastern and central North America, having compound umbels of small white flowers and bipinnately compound leaves. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.