It's a picture of a taco. The shell is a half circle with three dots on the left side of it. There is lettuce poking out from the top and sides of the taco shell.
This Taco icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.