(chemistry) two or more atoms bound together as a single unit and forming part of a molecule
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
a person who has radical ideas or opinions
(mathematics) a quantity expressed as the root of another quantity
a character conveying the lexical meaning of a logogram
(linguistics) the form of a word after all affixes are removed
