swung dash

<character> A character similar to tilde but appearing in the same vertical position as a dash, i.e. half way up rather than at the top like tilde. ASCII does not include a swung dash so tilde is used instead.
It is commonly used for "approximates" or "is approximately equal to".
(1997-06-28)

Noun
1. a punctuation mark used in text to indicate the omission of a word
(hypernym) punctuation, punctuation mark