radical — An Etymological Dictionary of Astronomy and Astrophysics

radical

ریشه، ریشگی، ریشال

rišé (#), rišegi (#), rišâl

Fr.: racine

Math.: The indicated root of a quantity, as denoted by an expression written under the → radical sign.
Chemistry: A group of atoms present in a series of compounds which conserves its identity in the course of chemical changes which affect the rest of the molecule.
For example, the
→ cyano radical and → hydroxyl group.

Etymology (EN): M.E., from L.L. radicalis “of or having roots,” from → radix “root.”

Etymology (PE): → root.

An Etymological Dictionary of Astronomy and Astrophysics