in mathematics, the number under a radical sign, by 1843, from German, from Modern Latin radicandus, gerundive of radicare "to take root," from radix "root" (from PIE root *wrād- "branch, root").
Entries linking to radicand
*wrād-
Proto-Indo-European root meaning "branch, root."
It forms all or part of: deracinate; eradicate; eradication; irradicable; licorice; radical; radicant; radicle; radicular; radish; ramada; ramify; ramus; rhizoid; rhizome; rhizophagous; root; rutabaga; wort.
It is the hypothetical source of/evidence for its existence is provided by: Greek rhiza, Lesbian brisda "root," Greek hradamnos "branch;" Latin radix) "root, radish;" Gothic waurts, Old English wyrt; Welsh gwraidd, Old Irish fren "root."