| 单词 | positioner |
| 释义 | positioner /peuh zish"euh neuhr/, n. 1. a person or thing that positions. 2. 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. [1930-35; POSITION + -ER1] |
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