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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

causal agent, cause, causal agency go
any entity that produces an effect or is responsible for events or results

agent go
an active and efficient cause

vasoconstrictor, vasoconstrictive, pressor go
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

adrenergic, adrenergic drug
drug that has the effects of epinephrine

noun.artifact

2 Subcategories

phenylephrine go
a powerful vasoconstrictor used to dilate the pupils and relieve nasal congestion
phenylpropanolamine go
an adrenergic drug used in many preparations to relieve allergic reactions or respiratory infections