This is a Section 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 12,500 icons, all in the same style and quality.
The icon is shape like two horizontal S shapes. However they are not separate, instead they over lap a bit. The bottom of the top S connects to the middle of the bottom one and the top of the bottom S connects with the middle of the top one.
Related to Section Icon
Related icons are the icons with matching tags, as well as all science icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors