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agent

agent

173 4.5
A thing or substance that causes a specific effect, often in medicine
  • noun
  • /ˈeɪdʒənt/
  • Specialized
translation icon : agente
  • Liu has experimented with a range of anti-mold agents and thinks he has found the right formula.
  • causative agent
  • etiologic agent
  • infectious agent

Now we're going to start by showing you some thickening agents can work.

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Examples

  • The researcher tested various environmental agents to see how they impact plant growth.

  • Finally, the types and doses of immunosuppressive agents administered may have an effect on vaccine immunogenicity.

    Academic text (2017)
  • These are all potential ways in which change agents can operate.

  • Now we're going to start by showing you some thickening agents can work.

  • Carnegie described himself as an agent of the poor.

  • Although a broad range of infectious agents was identified, the etiology of most cases remains unknown.

    Academic text (2015)
  • This technique uses chemicals known as cryoprotectin agents to prevent ice from forming.

  • Knox developed a systematic approach to identify atmospheric agents that might contribute to childhood cancer.

    Academic text (2008)
  • In a clinical trial, the drug acts as an agent that reduces symptoms of the disease.

  • Antibiotics are effective agents in fighting bacterial infections.

Synonyms

causal agent
vsagent
  • Specialized
1 7.0

A person or thing that makes something happen

is used specifically in scientific or medical contexts rather than everyday speech
effector
vsagent
1 8.5

A person or thing that makes something happen

is the broader scientific term that highlights responsibility in research or medicine
effecter
vsagent
9.9

A person or thing that makes something happen

is the standard scientific label for a cause rather than a general doer

Compounds

155 2.8

A person who works for the FBI and investigates serious crimes

104 3.5

A person who works for the country's government to enforce laws and investigate crimes

free agent
  • Jargon
80 3.9

A professional athlete not under contract who can sign with any team

57 2.4

A person who helps people buy, sell, or rent houses and other buildings

57 2.6

A person who helps people sell, rent or manage homes

37 3.5

A person allowed by law to do one specific task they are told to do

33 1.6

A person or company that books tickets, hotels and transport for people going on a trip

27 3.4

A person who gathers hidden information for a government about enemies

A person who works secretly for the police to gather information while hiding who they are

18 4.9

A spy who secretly works for two opposing sides while pretending to help one and giving secrets to the other

A person who sells insurance and helps people choose plans

A person who works for the government and acts for it

intelligence agent
  • Specialized
13 3.0

A person who secretly works for a government to get information about the country's safety

13 8.8

A very poisonous chemical used as a weapon that stops the nerves from working and makes people stop breathing

10 6.5

A germ or toxin used on purpose to make people sick, often as a weapon

A person who finds publishers for writers and makes book deals

Agent Orange
  • Literature
9 7.6

A strong chemical sprayed in the Vietnam War to kill plants that caused long-term harm to people and land

8 3.4

A person who helps actors or musicians find work

chemical agent
  • Specialized
7 4.1

A substance used to cause or speed up a change in other substances

6 3.7

A person who works to get news and attention for a company, group, or famous person

infectious agent
  • Specialized
5 4.2

A tiny living thing like a virus or bacterium that can make people and animals sick

4 6.3

A person who acts alone and does not follow group plans

4 2.1

A person who sells tickets for events or travel

foreign agent
  • Formal
3 6.7

A person or group the government requires to report activities and funding from another country

booking agent
  • Jargon
3 3.7

A person or company that arranges performances for people like musicians and actors

A person who secretly encourages others to break the law to make them look guilty

A person or company who finds work for actors in plays, films, and television

2 3.8

A person who sells books by visiting homes or towns

A person who secretly gathers and gives information to another country

antiviral agent
  • Specialized
1 3.5

A substance like a medicine that stops a virus growing or kills it

A person who advises people in the countryside about farming and home skills

1 5.8

A government worker who looks into serious money crimes like tax fraud and making fake money

causal agent
  • Specialized
1 7.0

A person or thing that makes something happen

active agent
  • Specialized
1 4.2

A substance that directly changes how a body or germ works

1 4.4

A police officer who investigates and stops illegal drug crimes

A person who buys goods or services for a company

shipping agent
  • Specialized
1 3.6

A person or company that arranges cargo, customs, and port services for a ship

1 4.2

A person who runs a train station and helps passengers

blocking agent
  • Specialized
1 5.8

A medicine that stops or reduces a body process, for example a hormone action

bleaching agent
  • Specialized
1 3.7

A chemical used to make things white or remove their color

1 4.8

A person who looks at insurance claims and helps arrange payments

county agent
  • Formal
1 5.8

A government worker who gives farmers and rural families advice about farming and household matters

A person who helps people find jobs

anesthetic agent
  • Specialized
1 4.1

A drug that temporarily makes part of the body feel no pain during medical treatment

alkylating agent
  • Specialized
1 6.9

A medicine that treats some cancers by adding small chemical groups to DNA to stop cell growth

espionage agent
  • Specialized
1 5.8

A person who secretly gets information for another country or company

A person who organizes and checks the arrival and delivery of goods for a shipping company

leavening agent
  • Specialized
1 3.8

An ingredient added to dough or batter to make it rise and become lighter

lethal agent
  • Specialized
1 7.7

A poison or gas that can kill people

1 9.9

A very strong chemical weapon that causes severe blisters and harms the lungs and eyes

1 2.7

A person who helps people buy, sell, or rent homes

Indian agent
  • Archaic
1 8.0

A United States government worker who deals with Native American tribes on a reservation

infective agent
  • Specialized
1 5.1

A very small thing, living or not, that can make people sick

1 5.9

A drug that stops nerve signals to muscles and makes them relax or stop moving

psychotropic agent
  • Specialized
1 7.8

A chemical that changes a person's mood or thoughts

A person or company who finds buyers for someone and gets a fee

1 3.2

A person who handles customer support requests using a help desk system

transfer agent
  • Specialized
1 7.9

An organization that keeps records of a company's stock owners and handles transfers and cancellations of stock certificates

A drug that treats high blood pressure and fast heartbeat by slowing the heart

beta-blocking agent
  • Specialized
5.5

A medicine that slows the heart and lowers blood pressure

9.9

A harmful chemical that causes severe blisters on skin and damages eyes and lungs, often used as a weapon

blanching agent
  • Specialized
7.6

A chemical that removes color from food and cloth to make them white

bridge agent
  • Jargon
9.3

A person who secretly carries messages between a case officer and an undercover agent in enemy territory

bridge agent
  • Specialized
5.5

A program or device that connects two systems and translates data so they can communicate

booking agent
  • Texting
3.4

A computer program or online service that books and manages reservations like flights and restaurants

A person who manages business affairs for employees and represents them to employers

A liquid or powder that you use to clean skin, objects, and surfaces

A person or business in another country who buys goods to sell in their market

dissolving agent
  • Specialized
4.3

Liquid that makes other materials become part of it, like water

drying agent
  • Specialized
4.5

A material like silica gel that takes water from other things to make them dry

A person who represents actors, finds them work, negotiates contracts, and manages their careers

activating agent
  • Specialized
6.7

A chemical used in a mining process with bubbles to make a certain mineral stick to the bubbles

A thing used to make two surfaces stick together, like glue or tape

How Strong

growth factor
  • Specialized
3 3.9
stimulant
  • Specialized
27 4.9
proliferant
  • Specialized
9.9
promoter
31 4.2
agent
  • Specialized
173 4.5

Surface Forms

agent singular
agents plural

Morphology

agent = ag + ent

The idea of an 'agent' as a causal actor is derivable from 'act'/'agency', but the actual stem is a bound form and the suffix '-ent' is not a fully productive standalone element for learners.

Etymology

Agent comes from the Latin agere 'to do', so an agent can be anything that makes something happen; in science a chemical or germ called an agent is a 'doer' that causes a result.