(mechanical engineering) The smallest gear in a gear train.

To cut off the pinion of a bird’s wing, or otherwise disable or bind its wings, in order to prevent it from flying.

A wing. / (ornithology) The joint of a bird's wing farthest from the body. / (ornithology) Any of the outermost primary feathers on a bird's wing. / A moth of the genus Lithophane.

present participle of pinion

plural of pinion

Third-person singular simple present indicative form of pinion

simple past tense and past participle of pinion

A surname.

plural of Pinion

A pair of gears, consisting of a circular pinion that engages with the teeth of a flat bar, that converts rotational into linear motion; used in the steering mechanism of cars, and in some railways.