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.
Category: Government
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.
Category: Math
Ref: irrational (def. 4b). 5 2
of or pertaining to the root of a word.
Category: Grammar
Bot. of or arising from the root or the base of the stem.
Category: Botany
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.
Category: Government
Math. a quantity expressed as a root of another quantity.
Category: Math
Ref: radical sign.
Chem.
Category: Chemistry
Ref: group (def. 3). 3; free radical .
Category: Grammar
Ref: root1 (def. 10). 1 1 11
Origin of radical:
1350–1400; ME < LL rādīcālis having roots < L rādīc- (s. of rādīx) root1
Princeton's WordNet
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"
radical(noun)
a person who has radical ideas or opinions
radical(noun)
(mathematics) a quantity expressed as the root of another quantity
radical(noun)
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"
revolutionary, radical(adj)
markedly new or introducing radical change
"a revolutionary discovery"; "radical political views"
radical(adj)
arising from or going to the root or source
"a radical flaw in the plan"
radical(adj)
of or relating to or constituting a linguistic root
"a radical verb form"
radical, basal(adj)
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
extreme
radical political beliefs
radicalˈræd ɪ kəl
major or very great
radical changes
Wiktionary
radical(Noun)
A member of the most progressive wing of the Liberal Party; someone favouring social reform (but generally stopping short of socialism).
radical(Noun)
A member of an influential, centrist political party favouring moderate social reform, a republican constitution, and secular politics.
radical(Noun)
A person with radical opinions.
radical(Noun)
A root (of a number or quantity).
radical(Noun)
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.
radical(Noun)
In Semitic languages, any one of the set of consonants (typically three) that make up a root.
radical(Noun)
A group of atoms, joined by covalent bonds, that take part in reactions as a single unit.
radical(Noun)
A free radical.
radical(Adjective)
Favouring fundamental change, or change at the root cause of a matter.
His beliefs are radical.
radical(Adjective)
Of or pertaining to a root .
radical(Adjective)
Of or pertaining to the intrinsic nature of something.
radical(Adjective)
Thoroughgoing.
The spread of the cancer required radical surgery, and the entire organ was removed.
radical(Adjective)
Of or pertaining to the root of a word.
radical(Adjective)
Involving free radicals
radical(Adjective)
Excellent.
That was a radical jump!
Origin: From radical, from radicalis, from radix; see radix.
Webster Dictionary
Radical(adj)
of or pertaining to the root; proceeding directly from the root
Radical(adj)
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
Radical(adj)
belonging to, or proceeding from, the root of a plant; as, radical tubers or hairs
Radical(adj)
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
Radical(adj)
relating, or belonging, to the root, or ultimate source of derivation; as, a radical verbal form
Radical(adj)
of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below
Radical(noun)
a primitive word; a radix, root, or simple, underived, uncompounded word; an etymon
Radical(noun)
a primitive letter; a letter that belongs to the radix
Radical(noun)
one who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; -- opposed to conservative
Radical(noun)
a characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom
Radical(noun)
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
Radical(noun)
a radical quantity. See under Radical, a
Radical(adj)
a radical vessel. See under Radical, a
Translations for radical
Kernerman English Multilingual Dictionary
- wesenlikAfrikaans

- أساسيArabic

- корененBulgarian

- radicalPortuguese (BR)

- základníCzech

- fundamentalGerman

- grundlæggendeDanish

- ριζικός, βασικόςGreek

- radical, fundamentalSpanish

- põhimõttelineEstonian

- اصلیFarsi

- perinpohjainenFinnish

- fondamentalFrench

- יְסוֹדִיHebrew

- आधारिकHindi

- radikalan, temeljanCroatian

- gyökeresHungarian

- mendasarIndonesian

- grundvallar-Icelandic

- radicaleItalian

- 根本的なJapanese

- 근원적인Korean

- esminisLithuanian

- būtisksLatvian

- radikalMalay

- radiatorDutch

- grunnleggendeNorwegian

- podstawowy, zasadniczyPolish

- اصلیPersian

- اساسى، بنيادى، دراډيكال ګوندغړى، داساسى اوبنيادى سمون غوښتونكىPashto

- radicalPortuguese

- esenţialRomanian

- кореннойRussian

- základnýSlovak

- bistvenSlovenian

- radikalanSerbian

- grundläggande, fundamentalSwedish

- โดยรากฐานThai

- temel, asılTurkish

- 根本的Chinese (Trad.)

- корінний; основнийUkrainian

- بنیادیUrdu

- cơ bảnVietnamese

- 基本的Chinese (Simp.)

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