Main entry: stem, theme, base, root, root word, radical
Definition: (linguistics) the form of a word after all affixes are removed
Usage: thematic vowels are part of the stem
Main entry: radical
Definition: a character conveying the lexical meaning of a logogram
Main entry: radical
Definition: a person who has radical ideas or opinions
Main entry: radical
Definition: (mathematics) a quantity expressed as the root of another quantity
Main entry: group, radical, chemical group
Definition: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
Main entry: free radical, radical
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
Usage: in the body free radicals are high-energy particles that ricochet wildly and damage cells
Definition: 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
Usage: basal placentation; radical leaves
Main entry: extremist, ultra, radical
Definition: (used of opinions and actions) far beyond the norm
Usage: extremist political views; radical opinions on education; an ultra conservative
Main entry: radical, revolutionary
Definition: markedly new or introducing radical change
Usage: a revolutionary discovery; radical political views
Main entry: radical
Definition: arising from or going to the root or source
Usage: a radical flaw in the plan
Main entry: radical
Definition: of or relating to or constituting a linguistic root
Usage: a radical verb form