triiodothyronine
三碘甲腺原氨酸
三碘甲腺原氨酸
triiodothyronine n 1 :
thyroid hormone similar to thyroxine but with one less iodine atom per molecule and produced in smaller quantity ;
exerts the same biological effects as thyroxine but is more potent and briefer [
synonym : {
triiodothyronine },
{
liothyronine }, {
T }]
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 ]
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Triiodothyronine - Wikipedia Triiodothyronine (T3) Tests: MedlinePlus Medical Test T3 Tests: T3 Uptake Levels, Common Thyroid Conditions, and More - WebMD