Definition of radical (noun)
- (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
- an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule
- "in the body free radicals are high-energy particles that ricochet wildly and damage cells"
- synonyms: free radical
- a person who has radical ideas or opinions
- (mathematics) a quantity expressed as the root of another quantity
- a character conveying the lexical meaning of a logogram
- (linguistics) the form of a word after all affixes are removed
Definition of radical (adjective)
- (used of opinions and actions) far beyond the norm
- markedly new or introducing radical change
- "a revolutionary discovery"; "radical political views"
- synonyms: revolutionary
- arising from or going to the root or source
- "a radical flaw in the plan"
- of or relating to or constituting a linguistic root
- "a radical verb form"
- especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem
Source: Princeton University Wordnet