retainer
英 [r?'te?n?]
美[r?'ten?]
- n. 保持器；家臣；保持者；[機] 護圈；預(yù)付費用
英英釋意
- 1. a fee charged in advance to retain the services of someone
- 2. a person working in the service of another (especially in the household)
- 3. a dental appliance that holds teeth (or a prosthesis) in position after orthodontic treatment