A horizontal line placed above multiple quantities to indicate that they form a unit. It is most commonly used to denote
1. A radical (
),
2. Repeating decimals (
),
3. The line segment 
joining two points 
and 
,
4. The complex conjugate 
, or
5 Negation of a logical expression, 
.
See also
Bar,
Long Division Symbol,
Macron,
Radical,
Solidus
Explore with Wolfram|Alpha
References
Bringhurst, R. The Elements of Typographic Style, 2nd ed. Point Roberts, WA: Hartley and Marks,
p. 286, 1997.Referenced on Wolfram|Alpha
Vinculum
Cite this as:
Weisstein, Eric W. "Vinculum." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Vinculum.html
Subject classifications
