radical

radical

名词 radical:

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

同义词：group, chemical group

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

同义词：free radical

a person who has radical ideas or opinions

a character conveying the lexical meaning of a logogram

a sign placed in front of an expression to denote that a root is to be extracted

同义词：radical sign

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

同义词：root, root word, base, stem, theme

形容词 radical:

(used of opinions and actions) far beyond the norm

同义词：extremist, ultra

markedly new or introducing radical change

同义词：revolutionary

arising from or going to the root

of or relating to or constituting a linguistic root

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

同义词：basal