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" 同义词:basal,
of or relating to or constituting a linguistic root; "a radical verb form"
(used of opinions and actions) far beyond the norm; "extremist political views"; "radical opinions on education"; "an ultra conservative" 同义词:extremist, ultra,
markedly new or introducing radical change; "a revolutionary discovery"; "radical political views" 同义词:revolutionary,
arising from or going to the root or source; "a radical flaw in the plan"
(linguistics) the form of a word after all affixes are removed; "thematic vowels are part of the stem" 同义词:root, root word, base, stem, theme,
a character conveying the lexical meaning of a logogram
a person who has radical ideas or opinions
(mathematics) a quantity expressed as the root of another quantity
(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 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" 同义词:free radical,