Source : Webster's Revised Unabridged Dictionary (1913)
Agonist \Ag"o*nist\, n. [Gr. ?.]
One who contends for the prize in public games. [R.]
Source : WordNet®
agonist
n 1: the principal character in a work of fiction [syn: {protagonist}]
2: someone involved in a contest or battle (as in an agon)
[ant: {adversary}]
3: a muscle that contracts while another relaxes; "when bending
the elbow the biceps are the agonist"
4: (biochemistry) a drug that can combine with a receptor on a
cell to produce a physiological reaction