Definition of superlative for English Language Learners. grammar : the form of an adjective or adverb that is used to indicate the greatest degree of a particular quality : the superlative form of an adjective or adverb.
The body's systems speed up and cause symptoms that are common to hyperthyroidism when thereâs a high level of thyroid hormone in the bloodstream. Symptoms include: 1  anxiety. 2  irritability. 3  fatigue. 4  hand tremors. 5  increased or irregular heartbeat.6  excessive sweating. 7  difficulty sleeping.8  diarrhea or frequent bowel movements.he body's systems speed up and cause symptoms that are common to hyperthyroidism when thereâs a high level of thyroid hormone in the bloodstream. Symptoms include: 1  anxiety. 2  irritability. 3  fatigue. 4  hand tremors. 5  increased or irregular heartbeat. 6  excessive sweating. 7  difficulty sleeping. 8  diarrhea or frequent bowel movements.
Diseases of the thyroid gland can result in either production of too much (overactive thyroid disease or hyperthyroidism), too little (underactive thyroid disease or hypothyroidism) thyroid hormone, thyroid nodules, and/or goiter. Thyroid problems are much more common in women than in men. The most common cause of hypothyroidism and hyperthyroidism occurs due to problems within the thyroid and not the regulatory system. 2  Thyroid goiter: Thyroid goiter is any enlargement of the thyroid that can occur with hyperthyroidism or hypothyroidism but also with benign and malignant (cancerous) nodules.