Examples from the Web for efficaciousness
Nothing that we learn could possibly suggest to us the idea of what an influence or efficaciousness is.The Elementary Forms of the Religious Life|Emile Durkheim
A single one of its thrusts must equal and often surpass in efficaciousness the repeated wounds of the other.Bramble-bees and Others|J. Henri Fabre
A friend of Homœopathy, not a physician, desired to test the efficaciousness of this plant.