Definition of radical Radical
/ɚÌËdĘkĘl/ - [ratdukul] - radâ˘iâ˘cal
We found 43 definitions of radical from 7 different sources.
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What does radical mean?
WordNet
NounPlural: radicals |
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| radical - a person who has radical ideas or opinions | ||
| mortal, somebody, someone, individual, person, soul a single organism | ||
| anarchist, syndicalist, nihilist an advocate of anarchism | ||
| bolshie, bolshy, bolshevik, marxist, red emotionally charged terms used to refer to extreme radicals or revolutionaries | ||
| extremist a person who holds extreme views | ||
| leveler, leveller a radical who advocates the abolition of social distinctions | ||
| revolutionary, revolutionist, subversive, subverter a radical supporter of political or social revolution | ||
| terrorist a radical who employs terror as a political weapon; usually organizes with other terrorists in small cells; often uses religion as a cover for terrorist activities | ||
| trotskyist, trotskyite, trot radicals who support Trotsky's theory that socialism must be established throughout the world by continuing revolution | ||
| wobbly a member of the Industrial Workers of the World | ||
| radical - a character conveying the lexical meaning of a logogram | ||
| grapheme, graphic symbol, character (genetics) an attribute (structural or functional) that is determined by a gene or group of genes | ||
| radical - (mathematics) a quantity expressed as the root of another quantity | ||
| quantity, amount, measure an adequate or large amount; "he had a quantity of ammunition" | ||
| radical - (chemistry) two or more atoms bound together as a single unit and forming part of a molecule | ||
| group, chemical group | ||
| building block, unit a block of material used in construction work | ||
| molecule (physics and chemistry) the simplest structural unit of an element or compound | ||
| chemical science, chemistry the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions | ||
| acyl, acyl group any group or radical of the form RCO- where R is an organic group; "an example of the acyl group is the acetyl group" | ||
| alcohol group, alcohol radical the chemical group -OH | ||
| aldehyde group, aldehyde radical the chemical group -CHO | ||
| alkyl, alkyl group, alkyl radical any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons | ||
| allyl, allyl group, allyl radical the univalent unsaturated organic radical C3H5; derived from propylene | ||
| amino, amino group the radical -NH2 | ||
| amyl a hydrocarbon radical that occurs in many organic compounds | ||
| azido group, azido radical the univalent group N3- derived from hydrazoic acid | ||
| azo group, azo radical the bivalent group -N=N- united to two hydrocarbon groups | ||
| benzyl, benzyl group, benzyl radical the univalent radical derived from toluene | ||
| benzoyl group, benzoyl radical the univalent radical derived from benzoic acid | ||
| arsenic group, cacodyl group, cacodyl radical, cacodyl the univalent group derived from arsine | ||
| carbonyl group the bivalent radical CO | ||
| carboxyl, carboxyl group the univalent radical -COOH; present in and characteristic of organic acids | ||
| chromophore the chemical group that gives color to a molecule | ||
| cyanide group, cyanide radical, cyano group, cyano radical the monovalent group -CN in a chemical compound | ||
| glyceryl a trivalent radical derived from glycerol by removing the three hydroxyl radicals | ||
| hydrazo group, hydrazo radical the bivalent group -HNNH- derived from hydrazine | ||
| hydroxyl, hydroxyl group, hydroxyl radical the monovalent group -OH in such compounds as bases and some acids and alcohols | ||
| ketone group a group having the characteristic properties of ketones | ||
| methylene, methylene group, methylene radical the bivalent radical CH2 derived from methane | ||
| propyl, propyl group, propyl radical the monovalent organic group C3H7- obtained from propane | ||
| butyl a hydrocarbon radical (C4H9) | ||
| nitro group the group -NO3 | ||
| nitrite the radical -NO2 or any compound containing it (such as a salt or ester of nitrous acid) | ||
| uranyl, uranyl group, uranyl radical the bivalent radical UO2 which forms salts with acids | ||
| radical - (linguistics) the form of a word after all affixes are removed; "thematic vowels are part of the stem" | ||
| root, root word, base, stem, theme | ||
| signifier, word form, descriptor, form a piece of stored information that is used to identify an item in an information storage and retrieval system | ||
| linguistics the humanistic study of language and literature | ||
| radical - 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" | ||
| free radical | ||
Adjective |
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| radical - 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" | ||
| basal | ||
| phytology, botany the branch of biology that studies plants | ||
| radical - of or relating to or constituting a linguistic root; "a radical verb form" | ||
| linguistics the humanistic study of language and literature | ||
| radical - arising from or going to the root or source; "a radical flaw in the plan" | ||
| radical - markedly new or introducing radical change; "a revolutionary discovery"; "radical political views" | ||
| revolutionary | ||
| new unfamiliar; "new experiences"; "experiences new to him"; "errors of someone new to the job" | ||
| radical - (used of opinions and actions) far beyond the norm; "extremist political views"; "radical opinions on education"; "an ultra conservative" | ||
| extremist, ultra | ||
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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 bond s, that take part in reactions as a single unit. - radical (Noun)
A free radical . - radical (Adjective)
Favoring fundamental change, or change at the root cause of a matter. - radical (Adjective)
Of or pertaining to the intrinsic nature of something. - radical (Adjective)
Thoroughgoing. - radical (Adjective)
Of or pertaining to the root of a word. - radical (Adjective)
Involving free radical s. - radical (Adjective)
Excellent; awesome.
Webster DictionaryWebster's Unabridged Dictionary đ
- radical (a.)
Of or pertaining to the root; proceeding directly from the root. - radical (a.)
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 (a.)
Belonging to, or proceeding from, the root of a plant; as, radical tubers or hairs. - radical (a.)
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 (a.)
Relating, or belonging, to the root, or ultimate source of derivation; as, a radical verbal form. - radical (a.)
Of or pertaining to a radix or root; as, a radical quantity; a radical sign. See below. - radical (n.)
A primitive word; a radix, root, or simple, underived, uncompounded word; an etymon. - radical (n.)
A primitive letter; a letter that belongs to the radix. - radical (n.)
One who advocates radical changes in government or social institutions, especially such changes as are intended to level class inequalities; -- opposed to conservative. - radical (n.)
A characteristic, essential, and fundamental constituent of any compound; hence, sometimes, an atom. - radical (n.)
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 (n.)
A radical quantity. See under Radical, a. - radical (a.)
A radical vessel. See under Radical, a.
OmegaWiki DictionaryOmegaWiki Dictionary Ί
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radical
Going completely and thoroughly to the root or source. -
radical
A group of atoms that act together as a unit.
Chambers DictionaryChamber's 20th Century Dictionary đ
-
radical
radâ˛i-kal, adj. pertaining to the root or origin: original: fundamental: intrinsic: primitive: implanted by nature: not derived: serving to originate: (bot.) proceeding immediately from the root: (politics) ultra-liberal, democratic.ân. a root: a primitive word or letter: one who advocates radical reform, an uncompromising democratic politician: (chem.) the base of a compound.âv.t. Radâ˛icalise, to make radical.âv.i. to become radical, adopt radical political principles.ân. Radâ˛icalism, the principles or spirit of a radical or democrat.âadv. Radâ˛ically.ân. Radâ˛icalness. [Radix.]
Wikipedia 
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Chinese character
A radical (from Latin "radix", meaning "root") is the portion bearing the meaning of an inflected European word in Chinese. Early Western sinologists borrowed this term to refer to the semantic component of a Chinese character (Hanzi). Later, the term was also borrowed for a "second" meaning, the é¨éŚ (Pinyin: "bĂšshÇu", Japanese "bushu", Korean "busu"). This literally means "section header". It refers to the place where a character is listed in the dictionary.
For example, in the character 媽 "mÄ" or âmotherâ (shown right), the left part 弳 (pronounced nÇ in Mandarin Chinese) happens to be the semantic component and also the section header under which dictionaries list the graph. However, not all section headers function in a particular character as the semantic component; some are based on phonetics, while others are merely chosen for convenience, and play neither a semantic nor a phonetic role. These two meanings of âradicalâ are not synonymous, though they may coincide in a particular example, causing a great deal of confusion. (For clarity, both semantic component and section header terms are used here.)
The equivalents in cuneiform and Egyptian hieroglyphics are called determinatives.
Chinese character components, whether semantic or phonetic in role, are the building blocks for all Chinese Hanzi as well as in the derived forms of Japanese Kanji, Korean Hanja, and Vietnamese Chᝯ nôm and Chᝯ nho.
Since the Kangxi dictionary of 1716 was indexed using the 214
"ZĂŹhuĂŹ" section he
Part of speech
đ¤- radical, noun, singular of radicals.
Pronunciation
Word frequency
Sign Language
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