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The diacritical mark ( ~ ), used for example over the letter n in Spanish to indicate the palatal nasal sound (ny), as in cañón, "canyon," and over the vowels a and o in Portuguese to indicate nasalization, as in pão, "bread."
[Spanish, alteration of obsolete Catalan title, from Latin titulus, superscription.]
(Phonetics & Phonology) the diacritical mark (~) placed over a letter to indicate a palatal nasal consonant, as in Spanish señor. This symbol is also used in the International Phonetic Alphabet to represent any nasalized vowel
[C19: from Spanish, from Latin titulus title, superscription]
n., pl. -des.
1. a diacritic (~) placed over an n, as in Spanish mañana, to indicate a palatal nasal sound or over a vowel, as in Portuguese são, to indicate nasalization.
2. swung dash.
[1860–65; < Sp < Latin titulus superscription. See title]
A mark (~) placed over a letter in some languages to indicate pronunciation, such as over the “n” in the Spanish Señor.”