E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Homopathy (5 syl.).
The plan of curing a disease by very minute doses of a medicine which would in healthy persons produce the very same disease. The principle of vaccination is a sort of homopathy, only it is producing in a healthy person a mitigated form of the disease guarded against. You impart a mild form of small-pox to prevent the patient from taking the virulent disease. (Greek, homoios pathos, like disease.) (See HAHNEMANN.)