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.

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

    • ‘A sizable number of participants in this study applied pressure to the thyroid cartilage rather than the cricoid cartilage.’
    • ‘The epiglottis is a flap-like cartilage connected to the thyroid cartilage.’
    • ‘The hyoid bone, thyroid cartilage, and cricoid cartilages are located within the central portion of the neck.’
    • ‘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 thyroid cartilage may articulate with the hyoid bone.’
    • ‘The corpsman then palpated the thyroid cartilage and found the ‘Adam's apple’ or laryngeal prominence.’
    • ‘It may be long, terminating below the level of the thyroid cartilage, or short, terminating at the level of the hyoid bone.’

Origin

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

Pronunciation

thyroid

/ˈθaɪˌrɔɪd//ˈTHīˌroid/