‼ (a double exclamation mark,

Unicode character The Unicode Consortium and the ISO/IEC JTC 1/SC 2/ WG 2 jointly collaborate on the list of the characters in the Universal Coded Character Set. The Universal Coded Character Set, most commonly called the Universal Character Set ( UCS, officia ...

U+203C) may refer to: * !! (chess), a brilliant move chess notation *

Double factorial In mathematics, the double factorial or semifactorial of a number , denoted by , is the product of all the integers from 1 up to that have the same parity (odd or even) as . That is, :n!! = \prod_^ (n-2k) = n (n-2) (n-4) \cdots. For even , the ...

, an operator in mathematics * Retroflex click, a family of click consonants found only in Juu languages and in the Damin ritual jargon * Double-negation translation, !!''p'' = ''p''.

See also