Definify.com

Webster 1913 Edition

Thyroid

Thy′roid

,
Adj.
[Gr.
θυρεοειδήσ
shield-shaped;
θυρεόσ
a large, oblong shield (from
θύρα
a door) +
εἶδοσ
form: cf. F.
thyroïde
,
thyréoïde
.]
1.
Shaped like an oblong shield; shield-shaped;
as, the
thyroid
cartilage
.
2.
(Anat.)
Of or pertaining to the thyroid body, thyroid cartilage, or thyroid artery; thyroideal.
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.

Webster 1828 Edition

Thyroid

THY'ROID

,
Adj.
[Gr. a shield,and form.] Resembling a shield; applied to one of the cartilages of the larynx, so called from its figure, to a gland situated near that cartilage, and to the arteries and veins of the gland.
The thyroid cartilage constitutes the anterior,superior,and largest part of the larynx.
The thyroid gland is situated on the sides and front of the lower part of the larynx, and the upper part of the trachea. It is copiously supplied with blood, but is not known to furnish any secretion. It is the seat of the bronchocele or goiter.

Similar Results