(linguistics) the form of a word after all affixes are removed; "thematic vowels are part of the stem";
a sign placed in front of an expression to denote that a root is to be extracted;
a character conveying the lexical meaning of a logogram;
a person who has radical ideas or opinions;
(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 than has lost an electron and will stabilize itself by stealing an electron from a nearby molecule; "in the body free radicals are high-energy part;
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; "basal placentation"; "radical leaves";
(used of opinions and actions) far beyond the norm; "extremist political views"; "radical opinions on education"; "an ultra conservative";
markedly new or introducing radical change; "a revolutionary discovery"; "radical political views";
arising from or going to the root; "a radical flaw in the plan";
of or relating to or constituting a linguistic root; "a radical verb form";
