Thyroid gland

Thyroid gland
Thyroid Thy"roid, a. [Gr. qyreoeidh`s shield-shaped; qyreo`s a large, oblong shield (from qy`ra a door) + e'i^dos form: cf. F. thyro["i]de, thyr['e]o["i]de.] 1. Shaped like an oblong shield; shield-shaped; as, the thyroid cartilage. [1913 Webster]

2. (Anat.) Of or pertaining to the thyroid body, thyroid cartilage, or thyroid artery; thyroideal. [1913 Webster]

{Thyroid cartilage}. See under {Larynx}.

{Thyroid body}, or {Thyroid gland} (Anat.), an endocrine gland having two lobes, located in the floor of the mouth or the region of the larynx, which secretes two hormones ({thyroxine} and {triiodothyronine}) that regulate the rates of growth and metabloism. In man and most mammals it is a highly vascular organ, partly surrounding the base of the larynx and the upper part of the trachea. Cases of hypothyroidism, where the gland is insufficiently active, can be treated by administration of thyroxine or a combination of thyroxine and triiodothyronine.

{Thyroid dislocation} (Surg.), dislocation of the thigh bone into the thyroid foramen.

{Thyroid foramen}, the obturator foramen. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • thyroid gland — n THYROID (1) * * * a large endocrine gland situated in the base of the neck. It consists of two lobes, one on either side of the trachea, that are joined by an isthmus (sometimes a third lobe extends upwards from the isthmus). The thyroid gland… …   Medical dictionary

  • thyroid gland — thyroid UK [ˈθaɪrɔɪd] / US [ˈθaɪˌrɔɪd] or thyroid gland UK / US noun [countable] Word forms thyroid : singular thyroid plural thyroids Word forms thyroid gland : singular thyroid gland plural thyroid glands medical an organ in your neck that… …   English dictionary

  • thyroid gland — Anat. a two lobed endocrine gland, located at the base of the neck that secretes two hormones that regulate the rates of metabolism, growth, and development. Cf. thyroxine, triiodothyronine. [1685 95] * * * Endocrine gland in the throat that… …   Universalium

  • thyroid gland — a large endocrine gland situated in the base of the neck. It consists of two lobes, one on either side of the trachea, that are joined by an isthmus (sometimes a third lobe extends upwards from the isthmus). The thyroid gland consists of a large… …   The new mediacal dictionary

  • thyroid gland — gland that creates a hormone that increases the exchange of the materials in the body …   English contemporary dictionary

  • thyroid gland — noun located near the base of the neck (Freq. 6) • Syn: ↑thyroid • Derivationally related forms: ↑thyroidal (for: ↑thyroid) • Hypernyms: ↑endocrine …   Useful english dictionary

  • thyroid gland — A gland located beneath the voice box (larynx) that produces thyroid hormone. The thyroid helps regulate growth and metabolism …   English dictionary of cancer terms

  • thyroid gland — noun A large butterfly shaped endocrine gland situated on the front of the neck that produces various hormones. Removal due to thyroid cancer is termed a total thyroidectomy …   Wiktionary

  • thyroid gland — thy′roid gland n. anat. a two lobed endocrine gland at the base of the neck and secreting two hormones that regulate the rates of metabolism, growth, and development Compare thyroxine triiodothyronine …   From formal English to slang

  • thyroid gland — /ˈθaɪrɔɪd glænd / (say thuyroyd gland) noun a bilobate ductless gland lying on either side of the windpipe or trachea and connected below the larynx by a thin isthmus of tissue. Its internal secretion is important in regulating the rate of… …  

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