形容词

1. 第二位的;次要的;从属的
If you describe something as secondary, you mean that it is less important than something else.

2. (疾病、感染)继发性的，第二期的
Secondary diseases or infections happen as a result of another disease or infection that has already happened.

3. (教育)中等的，中学的
Secondary education is given to pupils between the ages of 11 or 12 and 17 or
18.

1. coil such that current is induced in it by passing a current through the primary coil

Synonym: secondary coilsecondary winding

2. the defensive football players who line up behind the linemen