means A rotary machine that converts the energy of a moving fluid—water, steam, gas, or wind—into rotational motion, typically to drive a generator or other mechanism.

from From Latin 'turbo,' meaning a spinning top, a whirlwind, or anything that whirls in a dizzy circle—the same root that gives us 'turbulent' and 'disturb.' The word was coined in the 1820s by French engineer Claude Burdin, who fused that ancient sense of whirling with the suffix '-ine' to christen the spinning water-wheels of the industrial age. So the name itself is a tiny vortex, carried down from Roman tongues describing the giddy motion of a child's toy.