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A hooked stroke with a horizontal bar, indicating a root of a number.
Also known as: Radical sign, Root symbol, Surd
The radical sign indicates a square root, or with an index, a higher root. The overbar shows exactly how much of the expression the root applies to.
Indicates the square root of the quantity beneath it — the number which, multiplied by itself, gives that quantity.
Contexts: Mathematics
Carries a small index to indicate higher roots, so a raised 3 denotes a cube root.
Contexts: Mathematics
Uses its horizontal overbar, the vinculum, to mark exactly which terms fall under the root — a grouping device as much as a symbol.
Contexts: Mathematics
A short rising stroke turning into a tall hooked stroke with a bar extending right.