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Let $\sqrt [n] P$ denote the $n$th root of an expression.
Then $P$ is the radicand of $\sqrt [n] P$.
That is, it is the object whose $n$th root is to be taken.
The word radicand comes from:
- the word radical, itself deriving from the Latin radix meaning root
- the suffix -and, originating from the Latin gerundive form, loosely meaning that which needs to be ...
That is, radicand literally means that which needs to have its root extracted.
- 1989: Ephraim J. Borowski and Jonathan M. Borwein: Dictionary of Mathematics ... (previous) ... (next): radicand