Idea of Gender Icon
It's a gender icon, represented by two circles, interlocking. The one to the left is lower, with a cross, "addition sign" extending diagonally to the left downward. The circle that is higher and to the right has an arrow pointing upwards and to the right extending from its outer center. These represent male and female.
This is a Gender icon. It is available in PNG and vector. Downloading is free for PNGs up to 100x100px.