colicroot

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

• noun Any of certain perennial herbs of the genus Aletris, especially A. farinosa of eastern North America, having racemes of small white flowers and rootstocks formerly used to treat colic.
• noun Any of various other plants thought to relieve colic.

from The Century Dictionary.

• noun A name in the United States of several plants having reputed medicinal virtues, as Aletris farinosa, Dioscorea villosa, and Liatris squarrosa.

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

• noun A bitter American herb of the Bloodwort family, with the leaves all radical, and the small yellow or white flowers in a long spike (Aletris farinosa and Aletris aurea). Called sometimes star grass, blackroot, blazing star, and unicorn root.

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

• noun A bitter American herb of the bloodwort family, with small yellow or white flowers in a long spike.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any of several perennials of the genus Aletris having grasslike leaves and bitter roots reputed to cure colic
• noun any of several perennials of the genus Aletris having grasslike leaves and bitter roots reputed to cure colic