overline

A horizontal line placed above multiple quantities to indicate that they form a unit. It is most commonly used to denote 1. A radical (sqrt(12345)), 2. Repeating decimals (0.111^_), 3. The line segment (A B)^_ joining two points A and B, 4. The complex conjugate (z_1 + z_2)^_, or 5 Negation of a logical expression, (A⋀B)^_ = !(A⋀B).

bar | long division symbol | macron | radical | solidus