deltoid | definition

shoulder muscle that abducts the arm as well as flexes and medially rotates it, and extends and laterally rotates it


Betts, J. G., Young, K. A., Wise, J. A., Johnson, E., Poe, B., Kruse, D. H., … DeSaix, P. (n.d.). Anatomy and Physiology. Houston, Texas: OpenStax. Access for free at: