| 单词 | activator |
| 释义 | activator /ak"teuh vay'teuhr/, n. 1. a person or thing that activates. 2. Chem. , Biochem. a catalyst. 3. any impurity in a mineral that causes luminescence. Cf. inhibitor (def. 3). 4. Orthodontics. a removable appliance, usually of hard plastic, that is worn in the mouth instead of a fixed appliance to help align the teeth and improve the relationship of the lower jaw to the upper. [ACTIVATE + -OR2] |
| 随便看 |
英语词典包含168451条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。