Pronunciation: (pin'hwēl", -wēl"), [key]
1. a child's toy consisting of a wheel or leaflike curls of paper or plastic loosely attached by a pin to a stick, designed to revolve when blown by or as by the wind.
2. Also called catherine wheel. a kind of firework supported on a pin which, when ignited, revolves rapidly and gives a dazzling display of light.
3. a wheel having pins at right angles to its rim for engaging the teeth of a gear.
to revolve rapidly like a pinwheel: Images of the past pinwheeled through his mind. Also,pin' wheel".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.