Thoracic:Pertaining to thechest. For example, thethoracicaortais the part of the aorta that lies within the chest. From Healthy Resources 10 Rheumatoid Arthritis Symptoms What Is Exocrine Pancreatic Insufficiency? Understanding COVID-19 Testing and Treatment Featured Centers What Are the Best PsA Treatments for You? Understanding Biologics 10 Things People With Depression Wish You Knew Health SolutionsFrom Our Sponsors