Definition of radical sign in English:

radical sign

Line breaks: rad|ical sign

noun

Mathematics
The sign √ which indicates the square root of the number following (or a higher root indicated by a preceding superscript numeral).

Definition of radical sign in:

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Word of the day flagitious
Pronunciation: fləˈdʒɪʃəs
adjective
(of a person or their actions) criminal; villainous