Used attributively before another noun, e.g., "trackpad gestures".
Definitions
trackpadnoun
A flat, touch-sensitive surface on a laptop or other device that is used to control the cursor and input commands by detecting the movement and position of a user's fingers.
She used the trackpad on her laptop to navigate through the presentation slides.
trackpadadjective
Relating to or designed for use with a trackpad.
The laptop supports several trackpad gestures for easier navigation.