English > group: 5 senses > noun 1, Tops| Meaning | Any number of entities (members) considered as a unit. |
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| Synonym | grouping |
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| Instances | Great Lakes | A group of five large, interconnected lakes in central North America |
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| Narrower | actinoid, actinide, actinon | Any of a series of radioactive elements with atomic numbers 89 through 103 |
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| arrangement | An orderly grouping (of things or persons) considered as a unit |
| association | (ecology) a group of organisms (plants and animals) that live together in a certain geographical region and constitute a community with a few dominant species |
| biological group | A group of plants or animals |
| circuit | (law) a judicial division of a state or the United States (so-called because originally / originally judges traveled and held court in different locations) |
| citizenry, people | The body of citizens of a state or country |
| collection, aggregation, accumulation, assemblage | Several things grouped together or considered as a whole |
| community, biotic community | (ecology) a group of interdependent organisms inhabiting the same region and interacting with each other |
| edition | All of the identical copies of something offered to the public at the same time |
| electron shell | A grouping of electrons surrounding the nucleus of an atom |
| ethnic group, ethnos | people of the same race or nationality who share a distinctive culture |
| halogen | Any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions |
| kingdom | A basic group of natural objects |
| multitude, masses, mass, hoi polloi, people, the great unwashed | The common people generally |
| people | (plural) any group of human beings (men or women or children) collectively |
| population | A group of organisms of the same species inhabiting a given area |
| race | People who are believed to belong to the same genetic stock |
| rare earth, rare-earth element, lanthanoid, lanthanide, lanthanon | Any element of the lanthanide series (atomic numbers 57 through 71) |
| sainthood | saints collectively |
| series | A group of postage stamps having a common theme or a group of coins or currency selected as a group for study or collection |
| social group | People sharing some social relation |
| straggle | A wandering or disorderly grouping (of things or persons) |
| subgroup | A distinct and often subordinate group within a group |
| swarm, cloud | A group of many things in the air or on the ground |
| system, scheme | A group of independent but interrelated elements comprising a unified whole |
| varna | (Hinduism) the name for the original social division of Vedic people into four groups (which are subdivided into thousands of jatis) |
| world, human race, humanity, humankind, human beings, humans, mankind, man | All of the living human inhabitants of the earth |
| Broader | abstraction, abstract entity | A general concept formed by extracting common features from specific examples |
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| Spanish | agrupación, colectivo, grupo |
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| Catalan | agrupació, col·lectiu, grup |
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| Verbs | group | arrange into a group or groups |
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| group | form a group or group together |
English > group: 5 senses > noun 2, substance| Meaning | (chemistry) two or more atoms bound together as a single unit and forming part of a molecule. |
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| Synonyms | radical, 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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