Definitions for radicalˈræd ɪ kəl
Random House Webster's College Dictionary
rad•i•calˈræd ɪ kəl(adj.)
of or going to the root or origin; fundamental.
thoroughgoing or extreme:
a radical change in company policy.
favoring drastic political, economic, or social reforms.
existing inherently in a thing or person:
radical defects of character.
Math. pertaining to or forming a root. denoting or pertaining to the radical sign.
Ref: irrational (def. 4b). 5 2
of or pertaining to the root of a word.
Bot. of or arising from the root or the base of the stem.
Slang. great; marvelous; wonderful.
Category: Status (usage)
(n.)a person who holds or follows strong convictions or extreme principles; extremist.
a person who advocates fundamental political, economic, and social reforms by direct and often uncompromising methods.
Math. a quantity expressed as a root of another quantity.
Ref: radical sign.
Ref: group (def. 3). 3; free radical .
Ref: root1 (def. 10). 1 1 11
Origin of radical:
1350–1400; ME < LL rādīcālis having roots < L rādīc- (s. of rādīx) root1
group, radical, chemical group(noun)
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule
free radical, radical(noun)
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"
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
root, root word, base, stem, theme, radical(adj)
(linguistics) the form of a word after all affixes are removed
"thematic vowels are part of the stem"
extremist, radical, ultra(adj)
(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 or source
"a radical flaw in the plan"
of or relating to or constituting a linguistic root
"a radical verb form"
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"
Kernerman English Learner's Dictionary
radical(adjective)ˈræd ɪ kəl
radical political beliefs
radicalˈræd ɪ kəl
major or very great
A member of the most progressive wing of the Liberal Party; someone favouring social reform (but generally stopping short of socialism).
A member of an influential, centrist political party favouring moderate social reform, a republican constitution, and secular politics.
A person with radical opinions.
A root (of a number or quantity).
In logographic writing systems as the Chinese writing system, the portion of a character (if any) that provides an indication of its meaning, as opposed to phonetic.
In Semitic languages, any one of the set of consonants (typically three) that make up a root.
A group of atoms, joined by covalent bonds, that take part in reactions as a single unit.
A free radical.
Favouring fundamental change, or change at the root cause of a matter.
His beliefs are radical.
Of or pertaining to a root .
Of or pertaining to the intrinsic nature of something.
The spread of the cancer required radical surgery, and the entire organ was removed.
Of or pertaining to the root of a word.
Involving free radicals
That was a radical jump!
Origin: From radical, from radicalis, from radix; see radix.
of or pertaining to the root; proceeding directly from the root
hence: Of or pertaining to the root or origin; reaching to the center, to the foundation, to the ultimate sources, to the principles, or the like; original; fundamental; thorough-going; unsparing; extreme; as, radical evils; radical reform; a radical party
belonging to, or proceeding from, the root of a plant; as, radical tubers or hairs
proceeding from a rootlike stem, or one which does not rise above the ground; as, the radical leaves of the dandelion and the sidesaddle flower
relating, or belonging, to the root, or ultimate source of derivation; as, a radical verbal form
of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below
a primitive word; a radix, root, or simple, underived, uncompounded word; an etymon
a primitive letter; a letter that belongs to the radix
one who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; -- opposed to conservative
a characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom
specifically, a group of two or more atoms, not completely saturated, which are so linked that their union implies certain properties, and are conveniently regarded as playing the part of a single atom; a residue; -- called also a compound radical. Cf. Residue
a radical quantity. See under Radical, a
a radical vessel. See under Radical, a
Translations for radical
Kernerman English Multilingual Dictionary
relating to the basic nature of something
radical faults in the design.
- radicalPortuguese (BR)
- ριζικός, βασικόςGreek
- radical, fundamentalSpanish
- radikalan, temeljanCroatian
- podstawowy, zasadniczyPolish
- اساسى، بنيادى، دراډيكال ګوندغړى، داساسى اوبنيادى سمون غوښتونكىPashto
- grundläggande, fundamentalSwedish
- temel, asılTurkish
- 根本的Chinese (Trad.)
- корінний; основнийUkrainian
- cơ bảnVietnamese
- 基本的Chinese (Simp.)
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