Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
any of a genus (Spiranthes) of wild orchids with small, white flowers arranged spirally on spikes
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
also lady's tressesplural noun (used with a sing. or pl. verb)
Any of various orchids of the genus Spiranthes, having a spike or raceme of small flowers usually arranged in a spiral.