Tribadism
lesbian sexual practice in which the vulva is rubbed against a partner’s body for sexual stimulation / From Wikipedia, the free encyclopedia
Tribadism is a lesbian sexual act in which a woman rubs her vulva against her partner's vulva or another part of her partner's body for sexual stimulation. It is also known as scissoring, a sex position in which the women intertwine their legs and rub their vulvas together, or as tribading or tribbing.