It is a circle with a horizontal line directly in the middle of the circle. The horizontal line stops slightly before reaching the edge of the circle so no part of the line actually touches the circle itself.
This Minus icon is made in flat color style
. This format was developed by Icons8 designer team and became immensely popular for use in web and mobile applications. Feel free to download this icon in PNG format for free, or unlock other formats for $5. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 5,900 icons, all in the same style and quality.