retainer
英 [rɪ'teɪnə]
美[rɪ'tenɚ]
- n. 保持器；家臣；保持者；[机] 护圈；预付费用
英英释意
- 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