agonist


ag·o·nist

noun \ˈa-gə-nist\

Definition of AGONIST

1
:  one that is engaged in a struggle
2
[from antagonist]
a :  a muscle that is controlled by the action of an antagonist with which it is paired
b :  a chemical substance capable of combining with a specific receptor on a cell and initiating the same reaction or activity typically produced by the binding endogenous substance <dopaminergic agonists> — compare antagonist 2b

Origin of AGONIST

Late Latin agonista competitor, from Greek agōnistēs, from agōnizesthai to contend, from agōn
First Known Use: circa 1623

ag·o·nist

noun \ˈag-ə-nəst\   (Medical Dictionary)

Medical Definition of AGONIST

1
: a muscle that on contracting is automatically checked and controlled by the opposing simultaneous contraction of another muscle—called also agonist muscle, prime mover; compare antagonist a, synergist 2
2
: a chemical substance (as a drug) capable of combining with a receptor on a cell and initiating the same reaction or activity typically produced by the binding of an endogenous substance <binding of adrenergic agonists>—compare antagonist b

Browse

Next Word in the Dictionary: agonistic
Previous Word in the Dictionary: agonise
All Words Near: agonist

Seen & Heard

What made you want to look up agonist? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More