ladies'-tresses definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of a genus (Spiranthes) of wild orchids with small, white flowers arranged spirally on spikes
ladies'-tresses definition by American Heritage Dictionary
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.