Someone who accedes to some act, now especially a crime; one who contributes as an assistant or instigator to the commission of an offense.
Accompanying as a subordinate; additional; accessory; especially, uniting in, or contributing to, a crime, but not as chief actor. See accessory.
Any synergistic agent.
A chemical compound that increases the chemical activity of another compound when used with it.
One who holds the religious doctrine of synergism.