concept scale in category css
appears as: scale, The scale

This is an excerpt from Manning's book CSS in Depth.
Now, as you swipe your mouse across the menu items, you’ll see the icons grow a bit to help indicate which item you’re hovering over. I intentionally chose to use SVG image assets here, so there’s no pixelation or other odd distortions when the image size changes. The scale() transform is a perfect way to do this.
Scale—Shrinks or expands the element