полиграфия знак тильды, тильда
noun a character swung dash used in printing to conserve space by representing part or all of a previously spelled-out word
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".