English > radical: 11 senses > noun 1, substance| Meaning | (chemistry) two or more atoms bound together as a single unit and forming part of a molecule. |
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| Synonyms | group, chemical group |
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| Category | chemistry, chemical science | The science of matter |
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| Part of | molecule | (physics and chemistry) the simplest structural unit of an element or compound |
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| Narrower | acyl, acyl group | Any group or radical of the form RCO- where R is an organic group |
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| 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 |
| 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 |
| benzoyl group, benzoyl radical | The univalent radical derived from benzoic acid |
| benzyl, benzyl group, benzyl radical | The univalent radical derived from toluene |
| butyl | A hydrocarbon radical (C4H9) |
| cacodyl, cacodyl group, cacodyl radical, arsenic group | The univalent group derived from arsine |
| carbonyl group | The bivalent radical CO |
| carboxyl, carboxyl group | The univalent radical -COOH |
| chromophore | The chemical group that gives color to a molecule |
| cyano group, cyano radical, cyanide group, cyanide 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 group, methylene radical, methylene | The bivalent radical CH2 derived from methane |
| nitrite | The radical -NO2 or any compound containing it (such as a salt or ester of nitrous acid) |
| nitro group | The group -NO3 |
| propyl, propyl group, propyl radical | The monovalent organic group C3H7- obtained from propane |
| uranyl, uranyl group, uranyl radical | The bivalent radical UO2 which forms salts with acids |
| vinyl, vinyl group, vinyl radical | A univalent chemical radical derived from ethylene |
| Broader | unit, building block | A single undivided natural thing occurring in the composition of something else |
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| Spanish | grupo, grupo químico, radical |
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| Catalan | radical |
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English > radical: 11 senses > noun 3, person | Meaning | A person who has radical ideas or opinions. |
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| Narrower | Bolshevik, Marxist, red, bolshie, bolshy | emotionally charged terms used to refer to extreme radicals or revolutionaries |
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| Trotskyite, Trotskyist, Trot | Radicals who support Trotsky's theory that socialism / socialism must be established throughout the world by continuing revolution |
| Wobbly | A member of the Industrial Workers of the World |
| anarchist, nihilist, syndicalist | An advocate of anarchism |
| extremist | A person who holds extreme views |
| leveler, leveller | A radical who advocates the abolition of social distinctions |
| revolutionist, revolutionary, subversive, subverter | A radical supporter of political or social revolution |
| terrorist | A radical who employs terror as a political weapon |
| young Turk | A young radical who agitates for reform |
| Broader | person, individual, someone, somebody, mortal, soul | A human being |
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| Spanish | extremista, radical |
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| Catalan | extremista, radical |
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