abductor

1. One, such as a kidnapper, who abducts.
2. Anatomy. A muscle that draws a body part, such as a finger, arm, or toe, away from the midline of the body or of an extremity.

A muscle that moves a part of the body away from the midline, or causes the fingers or toes to spread apart.

A muscle that moves a part of the body away from the midline, or spreads the fingers or toes apart.

That which abducts.