| radical | | |
| chemical group, group, radical | (n.) | (chemistry) two or more atoms bound together as a single unit and forming part of a molecule. |
| free radical, radical | (n.) | 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" |
| radical | (n.) | a person who has radical ideas or opinions. |
| radical | (n.) | (mathematics) a quantity expressed as the root of another quantity. |
| radical | (n.) | a character conveying the lexical meaning of a logogram. |
| base, radical, root, root word, stem, theme | (n.) | (linguistics) the form of a word after all affixes are removed.; "thematic vowels are part of the stem" |
| extremist, radical, ultra | (adj.) | (used of opinions and actions) far beyond the norm.; "extremist political views"; "radical opinions on education"; "an ultra conservative" |
| radical, revolutionary | (adj.) | markedly new or introducing radical change.; "a revolutionary discovery"; "radical political views" |
| radical | (adj.) | arising from or going to the root or source.; "a radical flaw in the plan" |
| radical | (adj.) | of or relating to or constituting a linguistic root.; "a radical verb form" |
| basal, radical | (adj.) | 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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