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

human beings, human race, humanity, humankind, humans, mankind, world, man - all of the inhabitants of the earth; "all the world loves a lover"; "she always used `humankind' because `mankind' seemed to slight the women"

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

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 populating a given area; "they hired hunters to keep down the deer population"

hoi polloi, masses, 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"

actinide, actinoid, actinon - any of a series of radioactive elements with atomic numbers 89 through 103

lanthanide, lanthanoid, lanthanon, rare earth, rare-earth element - 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

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

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

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"

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

team, team up - form a team; "We teamed up for this new project"

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, gather, assemble, meet - collect in one place; "We assembled in the church basement"; "Let's gather in the dining room"