Attrahent

n. 1. That which attracts, as a magnet. [ 1913 Webster ]

The motion of the steel to its attrahent. Glanvill. [ 1913 Webster ]

2. (Med.) A substance which, by irritating the surface, excites action in the part to which it is applied, as a blister, an epispastic, a sinapism. [ 1913 Webster ]