Dynamic \Dy*nam"ic\, Dynamical \Dy*nam"ic*al\, a. [Gr. ? powerful, fr. ? power, fr. ? to be able; cf. L. durus hard, E. dure: cf. F. dynamique.]

1. Of or pertaining to dynamics; belonging to energy or power; characterized by energy or production of force.

Science, as well as history, has its past to show, -- a past indeed, much larger; but its immensity is dynamic, not divine. --J. Martineau.

The vowel is produced by phonetic, not by dynamic, causes. --J. Peile.

2. Relating to physical forces, effects, or laws; as, dynamical geology.

As natural science has become more dynamic, so has history. --Prof. Shedd.

Dynamical electricity. See under Electricity.

Source: Webster's Revised Unabridged Dictionary (1913)