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tilde

[til-duh] /ˈtɪl də/
noun
1.
a diacritic (~) placed over an n, as in Spanish mañana, to indicate a palatal nasal sound or over a vowel, as in Portuquese são, to indicate nasalization.
3.
Mathematics. a symbol (∼) indicating equivalency or similarity between two values.
4.
Logic. a similar symbol indicating negation.
Origin
1860-1865
1860-65; < Spanish < Latin titulus superscription. See title
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for tildes

tilde

/ˈtɪldə/
noun
1.
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
Word Origin
C19: from Spanish, from Latin titulus title, superscription
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for tildes

tilde

n.

1864, from Spanish, metathesis of Catalan title, from Latin titulus "inscription, heading" (see title (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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7
8
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