Merriam-Webster Collegiate Dictionary - pinion

 I. noun  Etymology: Middle English, probably modification of Anglo-French *empignon, enpenoun flight feathers, ultimately from Vulgar Latin *pinnion-, pinnio, from Latin pinna feather — more at pen  Date: 15th century  1. the terminal section of a bird's wing including the carpus, metacarpus, and phalanges; broadly wing  2. feather, quill; also flight feathers  • ~ed adjective  II. transitive verb  Date: 1558  1.  a. to disable or restrain by binding the arms  b. to bind fast ; shackle  2. to restrain (a bird) from flight especially by cutting off the ~ of one wing  III. noun  Etymology: French pignon, from Middle French peignon, from peigne comb, from Latin pecten — more at pectinate  Date: 1659  1. a gear with a small number of teeth designed to mesh with a larger wheel or rack  2. the smaller of a pair or the smallest of a train of gear wheels