radical
英 ['rædɪk(ə)l]
美['rædɪkl]
- adj. 激进的；根本的；彻底的
- n. 基础；激进分子；[物化] 原子团；[数] 根数
英英释意
- 1. (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
- 2. 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 particles that ricochet wildly and damage cells"
- 3. a person who has radical ideas or opinions
- 4. a character conveying the lexical meaning of a logogram
- 5. a sign placed in front of an expression to denote that a root is to be extracted
- 6. (linguistics) the form of a word after all affixes are removed;
- "thematic vowels are part of the stem"