It's the outline of an avocado that has been cut in half. The avocado is oval shaped. In the middle of it is it's pit which is also oval shaped.
This is a Avocado icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,300 icons, all in the same style and quality.