DEFINABLE • FREE-TRANSLATOR.COM • Definition of Definable

... stomach digests, the blood circulates, and all the different provinces of the little man-kingdom do their work. This something—call it nervous fluid, nervous power, vital energy, life-force, or anything else that you will—is a perfectly understood, if not a definable thing. It is plain, too, that people possess this force in very different degrees: some generating it as a high-pressure engine does steam, and using it constantly, with an apparently inexhaustible flow; and others who have ...

— The Atlantic Monthly, Volume 15, No. 89, March, 1865 • Various