stepparent

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++step·par·ent /ˈstepˌpeərənt $ -ˌper-/ noun [countable]  FAMILYa stepfather or stepmother 继父，后父；继母，后母

step·par·ent nounChineseSyllable  

stepparent
step‧par‧ent /ˈstepˌpeərənt $ -ˌper-/ noun [countable]
a stepfather or stepmother