preregistration
/ˈpriːˌredʒɪˈstreɪʃən/noun
mass noun
1
- as modifier relating to or denoting the period of a doctor's training between qualification and registration（医生取得资格和注册之间的）注册前时期：
the preregistration year.
注册前年份。
2
- the action of registering or being registered in advance预先登记; 预先注册：
members are entitled to free preregistration.
会员有权免费预先注册。