
Negation Sign
The symbol used to denote thenegation operation ("NOT") in symbolic logic, also called "logical not."
See also
NOTExplore with Wolfram|Alpha

More things to try:
References
Bringhurst, R.The Elements of Typographic Style, 2nd ed. Point Roberts, WA: Hartley and Marks, p. 281, 1997.Referenced on Wolfram|Alpha
Negation SignCite this as:
Weisstein, Eric W. "Negation Sign." FromMathWorld--A Wolfram Resource.https://mathworld.wolfram.com/NegationSign.html