[{"Bold_text": "noun", "List Items": ["Machinery.a gear with a small number of teeth, especially one engaging with a rack or larger gear.a shaft or spindle cut with teeth engaging with a gear.", "a gear with a small number of teeth, especially one engaging with a rack or larger gear.", "a shaft or spindle cut with teeth engaging with a gear.", "Metalworking.a gear driving a roll in a rolling mill."]}, {"Bold_text": "noun", "List Items": ["the distal or terminal segment of the wing of a bird consisting of the carpus, metacarpus, and phalanges.", "a feather .", "the flight feathers flight featherscollectively.", "Chiefly Literary.the wing of a bird."]}, {"Bold_text": "verb (used with object)", "List Items": ["to cut off the pinion of (a wing) or bind (the wings), as in order to prevent a bird from flying.", "to disable or restrain (a bird) in such a manner.", "to bind (a person's arms or hands) so they cannot be used.", "to disable (someone) in such a manner; shackle .", "to bind or hold fast, as to a thing:to be pinioned to one's bad habits."]}]