Radical symbol
Mathematical symbol denoting a root / From Wikipedia, the free encyclopedia
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"Root symbol" redirects here. For the root symbols for gene and protein families, see Gene nomenclature § Symbol and name.
"√" redirects here. For the check symbol (✓), see Check mark.
For symbols used by political radicals, see List of ideological symbols.
In mathematics, the radical symbol, radical sign, root symbol, radix, or surd is a symbol for the square root or higher-order root of a number. The square root of a number x is written as
while the nth root of x is written as
It is also used for other meanings in more advanced mathematics, such as the radical of an ideal.
In linguistics, the symbol is used to denote a root word.