Emily Dickinson Lexicon

CALC'U-LUS, n. [L. See Calculate.]

1. The stone in the bladder or kidneys.
2. In mathematics; Differential calculus, is the arithmetic of the infinitely small differences of variable quantities; the method of differencing quantities, or of finding an infinitely small quantity, which, being taken infinite times, shall be equal to a given quantity. This coincides with the doctrine of fluxions. – Encyc.
3. Exponential calculus, is a method of differencing exponential quantities; or of finding and summing up the differentials or moments of exponential quantities; or at least of bringing them to geometrical constructions. – Encyc.
4. Integral calculus, is a method of integrating or summing up moments or differential quantities; the inverse of the differential calculus. – Encyc.
5. Literal calculus, is specious arithmetic or algebra. – Encyc.