thy·ro·glob·u·lin 
(thī′rō-glŏbyə-lĭn)
(thī′rō-glŏbyə-lĭn)n.
1. A thyroid protein that assists in the synthesis of the iodine-containing hormones thyroxine and triiodothyronine and is typically present in the colloid of thyroid gland follicles.
2. A substance extracted from the thyroid glands of hogs, formerly used as a thyroid hormone supplement to treat hypothyroidism.
- irredenta
- irredentism
- irredentist
- irreducibility
- irreducible
- irreducibleness
- irreducibly
- irrefragability
- irrefragable
- irrefragably
- irrefrangible
- irrefrangibly
- irrefutability
- irrefutable
- irrefutably
- irreg.
- irregardless
- irregular
- irregular galaxy
- irregularity
- irregularly
- irrelative
- irrelatively
- irrelevance
- irrelevancy