causal agency, causal agent, cause - any entity that causes events to happen

vasoconstrictive, vasoconstrictor - any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure

biological agent, biohazard - any bacterium or virus or toxin that could be used in biological warfare

eliminator - an agent that eliminates something

impairer - an agent that impairs; "crops can be great impairers of the soil"

infectious agent, infective agent - an agent capable of producing infection

lethal agent - an agent capable of causing death

motor - a nonspecific agent that imparts motion; "happiness is the aim of all men and the motor of all action"

mutagen - any agent (physical or environmental) that can induce a genetic mutation or can increase the rate of mutation

enlivener, invigorator, quickener - an agent that gives or restores life or vigor; "the soul is the quickener of the body"

relaxer - any agent that produces relaxation; "music is a good relaxer"

represser, repressor - an agent that represses

retardant, retardent, retardation - any agent that retards or delays or hinders; "flame-retardant"

satisfier - any agent capable of producing satisfaction

shortener - any agent that shortens; "alcohol is a great shortener of life"

stressor - any agent that causes stress to an organism

teratogen - any agent that interferes with normal embryonic development: alcohol or thalidomide or X-rays or rubella are examples

transmitter, vector - any agent (person or animal or microorganism) that carries and transmits a disease; "mosquitos are vectors of malaria and yellow fever"; "fleas are vectors of the plague"; "aphids are transmitters of plant diseases"; "when medical scientists talk about vectors they are usually talking about insects"

weakener - that which weakens or causes a loss of strength; "doubt is a great weakener of resolve"

causal agency, causal agent, cause - any entity that causes events to happen

antiflatulent - any agent that reduces intestinal gas

antifungal, antifungal agent, antimycotic, antimycotic agent, fungicide - any agent that destroys or prevents the growth of fungi

blocking agent, blocker - a class of drugs that inhibit (block) some biological process

antimicrobial, antimicrobic, disinfectant, germicide - an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease

drug - a substance that is used as a medicine or narcotic

vermicide - an agent that kills worms (especially those in the intestines)

alkaliser, alkalizer, antacid, antiacid, gastric antacid - an agent that counteracts or neutralizes acidity (especially in the stomach)

bacteriostat - a chemical or biological material that inhibits bacterial growth

blanching agent, bleaching agent, whitener, bleach - an agent that makes things white or colorless

chemical agent - an agent that produces chemical reactions

coagulant, coagulator - an agent that produces coagulation

coolant - a fluid agent (gas or liquid) that produces cooling; especially one used to cool a system by transfering heat away from one part to another; "he added more coolant to the car's radiator"; "the atomic reactor used a gas coolant"; "lathe operators use an emulsion of oil and water as a coolant for the cutting tool"

diluent, dilutant, thinner - a diluting agent

emmenagogue - any agent that promotes menstrual discharge

galactagogue - agent that induces milk secretion

hypnagogue - an agent that induces drowsiness or sleep

hypoglycaemic agent, hypoglycemic agent - any of various agents that decrease the level of glucose in the blood and are used in the treatment of diabetes mellitus

inducer - an agent capable of activating specific genes

lactifuge - any agent that reduces milk secretion (as given to a woman who not breast feeding)

lactogen - any agent that enhances milk production

mitogen - an agent that triggers mitosis

nerve agent, nerve gas - a toxic gas that is inhaled or absorbed through the skin and has harmful effects on the nervous and respiratory system

precipitant - an agent that causes a precipitate to form

solvating agent - an agent that converts something into a solvate

viricide, virucide - an agent (physical or chemical) that inactivates or destroys viruses

business agent - an agent who handles business affairs for another; especially one who deals with employers

literary agent - an agent who represents an author is dealings with publishers

bailee - the agent to whom property involved in a bailment is delivered

booker, booking agent - someone who engages a person or company for performances

surrogate, deputy - a person appointed to represent or act on behalf of others

employment agent - someone who runs an employment agency

freight agent - an employee of a freight carrier who directs the receipt and delivery of goods

government agent - a representative or official of a government or administrative department of a government

handler - an agent who handles something or someone; "the senator's campaign handlers"

mill agent - the responsible official at a mill that is under absentee ownership

next friend - (law) a person who acts on behalf of an infant or disabled person

parliamentary agent - a person who is employed to look after the affairs of businesses that are affected by legislation of the British Parliament

placeholder, procurator, proxy - a person authorized to act for another

purchasing agent - an agent who purchases goods or services for another

representative - a person who represents others

intelligence agent, intelligence officer, operative, secret agent - a person secretly employed in espionage for a government

shipping agent - the agent of a shipowner

shopper - a commercial agent who shops at the competitor's store in order to compare their prices and merchandise with those of the store that employs her

special agent - someone whose authority is limited to the special undertaking they have been instructed to perform

talent agent - an agent who represents performers

general agent, universal agent - someone authorized to transact every kind of business for the principal

brokerage, brokerage firm, securities firm - a stock broker's business; charges a fee to act as intermediary between buyer and seller

auctioneer - an agent who conducts an auction

bourgeois, businessperson - a capitalist who engages in industrial commercial enterprise

insurance agent, insurance broker, underwriter, general agent - an agent who sells insurance

investment banker, underwriter - a banker who deals chiefly in underwriting new securities

estate agent, house agent, land agent, real estate agent, real estate broker, realtor - a person who is authorized to act as an agent for the sale of land; "in England they call a realtor a land agent"

ship broker - an agent for the ship owner; obtains cargo and may arrange for its loading or discharge

stockbroker - an agent in the buying and selling of stocks and bonds

syndic - one appointed to represent a city or university or corporation in business transactions

travel agent - someone who sells or arranges trips or tours for customers

Indian agent - a representative of the federal government to American Indian tribes (especially on Indian reservations)

functionary, official - a worker who holds or is invested with an office

Fed, federal official, Federal - any federal law-enforcement officer

trustbuster - a federal agent who engages in trust busting

participant role, semantic role - an entity realized by a noun or noun phrase in a clause or sentence