MMedical Dictionary Masseter Muscle Masseter Muscle A muscle whose action is closing the jaws. Masseter Muscle was last modified: June 24th, 2016 by explainingmedicine Related muscle 0 comment 0 Facebook Twitter Google + Pinterest explainingmedicine previous post Male Breast Cancer: Treatments next post Mastication (see Chewing) Related Articles Oropharyngeal Cancer: Tests June 13, 2016 Cirrhosis: Treatments June 13, 2016 Cardiac Septal Defects: Treatments June 13, 2016 Malleus (see Hammer) June 13, 2016 Infective Endocarditis (IE): Symptoms June 13, 2016 Bone Mineral Density (BMD) June 13, 2016 Audiology June 13, 2016 Pulmonary Hypertension (PH): Tests June 13, 2016 Patent Ductus Arteriosus (PDA) June 13, 2016 Phenylephrine (Into the nose) June 21, 2016