What is the meaning of Lytta?

A fibrous and muscular band lying within the longitudinal axis of the tongue in many mammals, as the dog. M () M, the thirteenth letter of the English alphabet, is a vocal consonant, and from the manner of its formation, is called the labio-nasal consonant. See Guide to Pronunciation, // 178-180, 242.

Source: Webster’s Revised Unabridged Dictionary (1913), via OPTED