What is moving a limb away from the midline of the body along the frontal plane called?

Moving a limb away from the midline of the body along the frontal plane is called abduction. This is any movement where your limbs (or another body part) are essentially moving out from the midline of your body. For example, if an individual were to raise straight arms from the side of their body out straight on either side, they would be using abduction.