- of or relating to the thyroid gland
- of or relating to the largest cartilage of the larynx
- See thyroid gland
- Also: thyroid extract the powdered preparation made from the thyroid gland of certain animals, used to treat hypothyroidism
WordReference Random House Learner's Dictionary of American English © 2026
thy•roid /ˈθaɪrɔɪd/USA pronunciation
adj.
n.
WordReference Random House Unabridged Dictionary of American English © 2026- Anatomyof or relating to the thyroid gland.
n.
- Anatomythyroid gland.
thy•roid
(thī′roid),USA pronunciation adj.
n.
thy•roi′dal, adj.
thy′roid•less, adj.
- Anatomyof or pertaining to the thyroid gland.
- Anatomyof or pertaining to the largest cartilage of the larynx, forming the projection known in humans as the Adam's apple.
n.
- AnatomySee thyroid gland.
- Anatomythe thyroid cartilage. See diag. under larynx.
- Anatomyan artery, vein, etc., in the thyroid region.
- Medicinea preparation made from the thyroid glands of certain animals, used in treating hypothyroid conditions.
- Greek thyreoeidé̄s shield-shaped, equivalent. to thyre(ós) oblong shield (literally, doorlike object, equivalent. to thýr(a) door + -eos adjective, adjectival suffix) + -oeidēs -oid
- variant of thyreoid 1685–95
thy′roid•less, adj.
Collins Concise English Dictionary © HarperCollins Publishers::
thyroid /ˈθaɪrɔɪd/ adj
'thyroid' also found in these entries (note: many are not synonyms or translations):
Adam's apple
- colloid
- cretinism
- endocrine gland
- goitre
- hyoid
- hyperthyroidism
- hypothyroidism
- iodine
- myxoedema
- parathyroid gland
- struma
- thymus
- thyro-
- thyroid gland
- thyrotropin
- thyroxine
- euthyroid
- exophthalmic goiter
- goiter
- Graves' disease
- hyperthyroid
- iodine 131
- organotherapy
- parathyroid
- potassium iodide
- propylthiouracil
- thiouracil
- thyroidectomy
- thyroiditis
- thyroid-stimulating hormone
- thyrosis
- thyrotome
- thyrotomy
- thyrotoxic
- thyrotrophic
- triiodothyronine
- TSH
- underactive