| 单词 | radical |
| 释义 | radical adj. & n. --adj 1. of the root or roots; fundamental (a radical error). 2. far-reaching; thorough; going to the root (radical change). 3. a advocating thorough reform; holding extreme political views; revolutionary. b (of a measure etc.) advanced by or according to principles of this kind. 4. forming the basis; primary (the radical idea). 5. Math. of the root of a number or quantity. 6. (of surgery etc.) seeking to ensure the removal of all diseased tissue. 7. of the roots of words. 8. Mus. belonging to the root of a chord. 9. Bot. of, or springing direct from, the root. 10. hist. belonging to an extreme section of the Liberal party. 11. US hist. seeking extreme anti-South action at the time of the Civil War. --n 1. a person holding radical views or belonging to a radical party. 2. Chem. a a free radical. b an element or atom or a group of these normally forming part of a compound and remaining unaltered during the compound's ordinary chemical changes. 3. the root of a word. 4. a fundamental principle; a basis. 5. Math. a a quantity forming or expressed as the root of another. b a radical sign. Phrases and idioms radical sign indicating the square, cube, etc., root of the number following. Derivatives radicalism n. radicalize v.tr. & intr. (also -ise). radicalization n. radically adv. radicalness n. Etymology: ME f. LL radicalis f. L radix radicis root |
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