n., pl., thal·li (thăl'ī), or -lus·es.
A plant body undifferentiated into stem, root, or leaf.
[Latin, green stalk, from Greek thallos, from thallein, to sprout.]
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.
