- 1. group, radical, chemical group, unit, building block
- usage: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
- 2. free radical, radical, atom
- usage: 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"
- 3. radical, person, individual, someone, somebody, mortal, soul
- usage: a person who has radical ideas or opinions
- 4. radical, measure, quantity, amount
- usage: (mathematics) a quantity expressed as the root of another quantity
- 5. radical, character, grapheme, graphic symbol
- usage: a character conveying the lexical meaning of a logogram
- 6. root, root word, base, stem, theme, radical, form, word form, signifier, descriptor
- usage: (linguistics) the form of a word after all affixes are removed; "thematic vowels are part of the stem"
WordNet 3.0 Copyright © 2006 by Princeton University.
- 1. extremist, radical, ultra, immoderate (vs. moderate)
- usage: (used of opinions and actions) far beyond the norm; "extremist political views"; "radical opinions on education"; "an ultra conservative"
- 2. revolutionary, radical, new (vs. old)
- usage: markedly new or introducing radical change; "a revolutionary discovery"; "radical political views"
- 3. radical, basic (vs. incidental)
- usage: arising from or going to the root or source; "a radical flaw in the plan"
- 4. radical
- usage: of or relating to or constituting a linguistic root; "a radical verb form"
- 5. radical (vs. cauline), basal
- usage: 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"
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See also: radical (Dictionary)