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Dictionary definition for: Radical
1. (n) (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
2. (s) (used of opinions and actions) far beyond the norm; "extremist political views" "radical opinions on education" "an ultra conservative"
3. (n) an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule than has lost an electron and will stabilize itself by stealing an electron from a nearby molecule; "in the body free radicals are high-energy part
4. (s) markedly new or introducing radical change; "a revolutionary discovery" "radical political views"
5. (n) a person who has radical ideas or opinions
6. (s) arising from or going to the root; "a radical flaw in the plan"
7. (n) a character conveying the lexical meaning of a logogram
8. (a) of or relating to or constituting a linguistic root; "a radical verb form"
9. (n) a sign placed in front of an expression to denote that a root is to be extracted
10. (a) 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; "basal placentation" "radical leaves"
11. (n) (linguistics) the form of a word after all affixes are removed; "thematic vowels are part of the stem"
WordNet 2.1 Copyright Princeton University. All rights reserved.
