Tilde
Pronunciation : Til"de
Part of Speech : n.
Etymology : [Sp., fr. L. titulus a superscription, title, token, sign. See Title, n.]
Definition : Defn: The accentual mark placed over n, and sometimes over l, in Spanish words [thus, ?, l], indicating that, in pronunciation, the sound of the following vowel is to be preceded by that of the initial, or consonantal, y.
Source : Webster's Unabridged Dictionary, 1913