snap fastener

1. 摁扣
   A snap fastener is a small metal object used to fasten clothes, made up of two parts which can be pressed together.

in BRIT, use 英国英语用 press stud, popper

1. Loess, stone, cotton& plastic snap fastener.
   黄土，石头，棉，塑料按扣。
2. Suitable for pinning up any kind of cloth tacking snap fastener, adding piece, tacking label and so on.
   适用于各种衣物的加固，以及缝钉钮扣、附加带条、钉签条等。

noun

1. a fastener used on clothing
   1. children can manage snaps better than buttons

   Synonym:    snappress stud