lyt·ta (l?t??)n. pl. lyt·tae (l?t???) 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 wl?kwo- in Indo-European roots.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.lytta (?l?t?) n, pl -tas or -tae (-ti?) (Zoology) a rodlike mass of cartilage beneath the tongue in the dog and other carnivores[C17: New Latin, from Greek lussa madness; in dogs, it was believed to be a cause of rabies]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014lyt?ta (?l?t ?) n., pl. lyt?tas, lyt?tae (?l?t i) a long, irregularly linear cartilage on the underside of the tongue of dogs and other carnivores. [1595?1605;