Definition of compounder:
(n) :
A person who compounds (mixes ingredients, and tests the result)
(n) :
One who attempts to bring persons or parties to terms of agreement, or to accomplish ends by compromises.
(n) :
One who compounds a debt, obligation, or crime.
(n) :
(UK, historical) A Jacobite who favoured the restoration of James II, on condition of a general amnesty and of guarantees for the security of the civil and ecclesiastical constitution of the realm.
(n) :
(UK, archaic) One at a university who pays extraordinary fees for the degree he is to take.