| group | | |
| n. (tops) | 1. group, grouping | any number of entities (members) considered as a unit. |
| ~ abstract entity, abstraction | a general concept formed by extracting common features from specific examples. |
| ~ human beings, human race, humankind, humans, mankind, humanity, world, man | all of the living human inhabitants of the earth.; "all the world loves a lover"; "she always used `humankind' because `mankind' seemed to slight the women" |
| ~ arrangement | an orderly grouping (of things or persons) considered as a unit; the result of arranging.; "a flower arrangement" |
| ~ straggle | a wandering or disorderly grouping (of things or persons).; "a straggle of outbuildings"; "a straggle of followers" |
| ~ kingdom | a basic group of natural objects. |
| ~ biological group | a group of plants or animals. |
| ~ biotic community, community | (ecology) a group of interdependent organisms inhabiting the same region and interacting with each other. |
| ~ people | (plural) any group of human beings (men or women or children) collectively.; "old people"; "there were at least 200 people in the audience" |
| ~ social group | people sharing some social relation. |
| ~ aggregation, collection, accumulation, assemblage | several things grouped together or considered as a whole. |
| ~ edition | all of the identical copies of something offered to the public at the same time.; "the first edition appeared in 1920"; "it was too late for the morning edition"; "they issued a limited edition of Bach recordings" |
| ~ electron shell | a grouping of electrons surrounding the nucleus of an atom.; "the chemical properties of an atom are determined by the outermost electron shell" |
| ~ ethnic group, ethnos | people of the same race or nationality who share a distinctive culture. |
| ~ race | people who are believed to belong to the same genetic stock.; "some biologists doubt that there are important genetic differences between races of human beings" |
| ~ 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. |
| ~ swarm, cloud | a group of many things in the air or on the ground.; "a swarm of insects obscured the light"; "clouds of blossoms"; "it discharged a cloud of spores" |
| ~ subgroup | a distinct and often subordinate group within a group. |
| ~ sainthood | saints collectively. |
| ~ citizenry, people | the body of citizens of a state or country.; "the Spanish people" |
| ~ population | a group of organisms of the same species inhabiting a given area.; "they hired hunters to keep down the deer population" |
| ~ hoi polloi, masses, the great unwashed, multitude, people, mass | the common people generally.; "separate the warriors from the mass"; "power to the people" |
| ~ varna | (Hinduism) the name for the original social division of Vedic people into four groups (which are subdivided into thousands of jatis). |
| ~ circuit | (law) a judicial division of a state or the United States (so-called because originally judges traveled and held court in different locations); one of the twelve groups of states in the United States that is covered by a particular circuit court of appeals. |
| ~ system, scheme | a group of independent but interrelated elements comprising a unified whole.; "a vast system of production and distribution and consumption keep the country going" |
| ~ 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.; "the Post Office issued a series commemorating famous American entertainers"; "his coin collection included the complete series of Indian-head pennies" |
| ~ great lakes | a group of five large, interconnected lakes in central North America. |
| ~ actinide, actinoid, actinon | any of a series of radioactive elements with atomic numbers 89 through 103. |
| ~ lanthanide, lanthanoid, lanthanon, rare-earth element, rare earth | any element of the lanthanide series (atomic numbers 57 through 71). |
| ~ 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. |
| n. (substance) | 2. chemical group, group, radical | (chemistry) two or more atoms bound together as a single unit and forming part of a molecule. |
| ~ chemical science, chemistry | the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions. |
| ~ building block, unit | a single undivided natural thing occurring in the composition of something else.; "units of nucleic acids" |
| ~ 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. |
| ~ molecule | (physics and chemistry) the simplest structural unit of an element or compound. |
| ~ 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. |
| ~ vinyl, vinyl group, vinyl radical | a univalent chemical radical derived from ethylene. |
| n. (cognition) | 3. group, mathematical group | a set that is closed, associative, has an identity element and every element has an inverse. |
| ~ subgroup | (mathematics) a subset (that is not empty) of a mathematical group. |
| ~ abelian group, commutative group | a group that satisfies the commutative law. |
| ~ set | (mathematics) an abstract collection of numbers or symbols.; "the set of prime numbers is infinite" |
| v. (cognition) | 4. group | arrange into a group or groups.; "Can you group these shapes together?" |
| ~ class, classify, sort out, assort, sort, separate | arrange or order by classes or categories.; "How would you classify these pottery shards--are they prehistoric?" |
| ~ regroup | reorganize into new groups. |
| ~ bracket | classify or group. |
| ~ chunk, collocate, lump | group or chunk together in a certain order or place side by side. |
| ~ batch | batch together; assemble or process as a batch. |
| v. (competition) | 5. aggroup, group | form a group or group together. |
| ~ team, team up | form a team.; "We teamed up for this new project" |
| ~ embed | attach to, as a journalist to a military unit when reporting on a war.; "The young reporter was embedded with the Third Division" |
| ~ gang, gang up | act as an organized group. |
| ~ pool | join or form a pool of people. |
| ~ brigade | form or unite into a brigade. |
| ~ foregather, forgather, assemble, gather, meet | collect in one place.; "We assembled in the church basement"; "Let's gather in the dining room" |
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