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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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Examples from the web for tilde
  • We place a tilde over the symbol to indicate that it is relative to the vertical diameter.
British Dictionary definitions for tilde

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 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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tilde in Technology
character
"~" ASCII character 126.
Common names are: ITU-T: tilde; squiggle; twiddle; not. Rare: approx; wiggle; swung dash; enyay; INTERCAL: sqiggle (sic).
Used as C's prefix bitwise negation operator; and in Unix csh, GNU Emacs, and elsewhere, to stand for the current user's home directory, or, when prefixed to a login name, for the given user's home directory.
The "swung dash" or "approximation" sign is not quite the same as tilde in typeset material but the ASCII tilde serves for both (compare angle brackets).
[Has anyone else heard this called "tidal" (as in wave)?]
(1996-10-18)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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6
7
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