drop-down menu
US /ˈdrɑːp.daʊn ˌmen.juː/
UK /ˈdrɑːp.daʊn ˌmen.juː/

1.
下拉菜单
a list of options that appears when you click on a button or text in a computer program or on a website
:
•
Select your country from the drop-down menu.
从下拉菜单中选择您的国家。
•
The font size can be adjusted using the drop-down menu.
字体大小可以使用下拉菜单进行调整。