n. pl. lyt·tae (lĭtē′)
A thin cartilaginous strip on the underside of the tongue of certain carnivorous mammals, such as dogs.
[Latin, worm under a dog's tongue (said to cause madness), from Greek lussa, lutta, madness, rabies; see wkwo- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.