olemus
juurt (4a) tähistav märk √
= the symbol √ indicating extraction of a root of the quantity that follows it

näiteid
https://duckduckgo.com/?q=radical+sign&t=h_&iax=images&ia=images

ülevaateid
https://en.wikipedia.org/wiki/Radical_symbol