Definition of thyroid in US English:

thyroid

noun

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

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

Origin

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

Pronunciation

thyroid

/ˈTHīˌroid//ˈθaɪˌrɔɪd/