noun
push button
A button that is pressed to operate something, such as a machine, device, or interface.
エレベーターのプッシュボタンを押してください。
Please press the push button for the elevator.
この機械はプッシュボタン一つで動きます。
This machine operates with a single push of a button.
Variant with a middle dot; less common in everyday writing.
ボタン is a general button, while プッシュボタン specifically refers to a button that is pushed (as opposed to toggled or turned).
Loanword from English 'push button'.