Definition of thyroid in English:



  • 1A large ductless gland in the neck that secretes hormones regulating growth and development through the rate of metabolism.

    • ‘When your thyroid gland produces too much of the hormone thyroxine, you develop hyperthyroidism.’
    • ‘This happens because the thyroid gland is not functioning properly.’
    • ‘In addition to palpation of the thyroid gland, a thorough examination of the lymph glands in the head and neck should be performed.’
    • ‘Here he was given clinical facilities to continue his researches into the thyroid gland and to practise surgery of the endocrine glands.’
    • ‘In most cases the whole thyroid gland will need to be removed (total thyroidectomy).’
    • ‘Thyroid medicine can replace the hormone your thyroid gland usually makes.’
    • ‘There are usually four to five parathyroids attached to the lateral lobes of the thyroid gland.’
    • ‘EDITOR O'Reilly suggests that the role of thyroid function tests should be reassessed.’
    • ‘However, this patient unfortunately died shortly after transformation of this papillary thyroid carcinoma.’
    • ‘The commonest cause of hypothyroidism is an autoimmune inflammation of the thyroid gland (thyroiditis).’
    • ‘This can disrupt the work of the thyroid gland, which regulates how our bodies burn calories.’
    • ‘The operative field for the thyroid gland is bound by the gland, its capsule, trachea and muscles.’
    • ‘Your doctor will take a tissue sample from your thyroid gland and examine it under a microscope to see if it is cancerous.’
    • ‘The publication of a reliable and practical assay for thyroid stimulating hormone was a landmark.’
    • ‘Being female - women are 10 times more likely to develop an overactive thyroid than men.’
    • ‘There are safe treatments for thyroid disorders during pregnancy.’
    • ‘That observation suggests a third active substance is secreted by the thyroid gland.’
    • ‘In men, serum thyroid hormones were sensitive to marginal changes in energy intake and expenditure.’
    • ‘Interestingly, Panax ginseng is also prescribed for low thyroid conditions.’
    • ‘In thyroiditis, there is inflammation of the thyroid gland from either infection or autoimmune attack.’
    1. 1.1An extract prepared from the thyroid gland of animals and used in treating deficiency of thyroid hormones.
      • ‘He was horrified that I had been taking dried animal thyroid and put me on Synthroid.’
      • ‘Any patient with suspected myxedema coma should be treated presumptively with thyroid hormone.’
      • ‘Other people tell us that they feel better on Armour thyroid.’
      • ‘Some patients may take thyroid preparations to achieve weight loss.’
      • ‘A month later, after he started taking thyroid extract, the life of the patient had been transformed.’
      • ‘My family physician put me on Armour thyroid, and it worked like a charm.’
      • ‘Most patients take the entire daily dose of desiccated thyroid in the morning.’
  • 2A large cartilage of the larynx, a projection of which forms the Adam's apple in humans.

    • ‘The epiglottis is a flap-like cartilage connected to the thyroid cartilage.’
    • ‘A sizable number of participants in this study applied pressure to the thyroid cartilage rather than the cricoid cartilage.’
    • ‘The thyroid cartilage may articulate with the hyoid bone.’
    • ‘It may be long, terminating below the level of the thyroid cartilage, or short, terminating at the level of the hyoid bone.’
    • ‘This procedure is occasionally coupled with suspension of the thyroid cartilage, which is performed to improve laryngeal elevation.’
    • ‘The thyroid cartilage is gently mobilized by manual distraction to either side.’
    • ‘The corpsman then palpated the thyroid cartilage and found the ‘Adam's apple’ or laryngeal prominence.’
    • ‘The hyoid bone, thyroid cartilage, and cricoid cartilages are located within the central portion of the neck.’


Early 18th century (as an adjective): from Greek (khondros) thureoeidēs shield-shaped (cartilage) from thureos oblong shield.