agent

nouns

an active and efficient cause; capable of producing a certain effect

"their research uncovered new disease agents"

agent

is derived from

is a type of (narrower)

any entity that produces an effect or is responsible for events or results

a representative who acts on behalf of other persons or organizations

agent

is derived from

is derived from

is a type of (narrower)

a person who represents others

a substance that exerts some force or effect

agent

is a type of (narrower)

any entity that produces an effect or is responsible for events or results

is a type of (narrower)

a particular kind or species of matter with uniform properties

"shigella is one of the most toxic substances known to man"

a businessman who buys or sells for another in exchange for a commission

agent, broker, factor

is derived from

any agent or representative of a federal agency or bureau

agent, federal agent

is derived from

the semantic role of the animate entity that instigates or causes the happening denoted by the verb in the clause

agent, agentive role