形容词

名词

1. 重大的;根本的;基本的;彻底的
Radical changes and differences are very important and great in degree.

1. (linguistics) the form of a word after all affixes are removed

e.g. thematic vowels are part of the stem

Synonym: rootroot wordbasestemtheme

2. a character conveying the lexical meaning of a logogram

3. a person who has radical ideas or opinions

4. (mathematics) a quantity expressed as the root of another quantity

5. (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

Synonym: groupchemical group

6. 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

e.g. in the body free radicals are high-energy particles that ricochet wildly and damage cells

Synonym: free radical