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单词 positioner
释义

WordReference Random House Unabridged Dictionary of American English © 2024
po•si•tion•er  (pə zishə nər),USA pronunciation n. 
  1. Dentistrya person or thing that positions.
  2. Dentistry[Orthodontics.]a removable device of resilient plastic material worn in the mouth usually during sleep to produce minor adjustments in the position of teeth after straightening appliances have been taken off.
  • position + -er1 1930–35

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