Euthyroid: The state of having normal thyroid gland function. As opposed to hyperthyroid (overactive thyroid) or hypothyroid (underactive thyroid). CONTINUE SCROLLING OR CLICK HERE FOR RELATED ARTICLE Last Editorial Review: 5/13/2016 Hyperthyroidism Slideshow Pictures Take the Thyroid Disorder Quiz Thyroid Symptoms and Solutions Slideshow Pictures Health Solutions From Our Sponsors Health in Young Adults Open Heart Alternatives Travelers Diarrhea 21st Century Cures How to Save a Life Care for Aortic Stenosis? Nutritious Smoothies Family Wellness Consider Clinical Trials Bent Fingers? Delicious Alternative to Milk Tips to Beat Heartburn Treat Type 2 Diabetes Rehabilitation Services What is TAVR?