n., pl., -cos.
- A twining perennial herb (Ullucus tuberosus) native to the Andes bearing fleshy tubers.
- The edible fleshy tuber of this plant.
[American Spanish, from Quechua ullucu.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.