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

Related Noun(s):group

Category: General

2.Definition: (linguistics) the form of a word after all affixes are removed

Related Noun(s):base, root, stem, theme

Category: General

3.Definition: (mathematics) a quantity expressed as the root of another quantity

Category: General

4.Definition: a character conveying the lexical meaning of a logogram

Category: General

5.Definition: a person who has radical ideas or opinions

Category: People

6.Definition: 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"

Category: General