unit of thyrotrophic activity

u·nit of thy·ro·troph·ic ac·tiv·i·ty

the activity of an amount of an extract of the anterior lobe of the hypophysis that, given daily for 5 days, will cause the thyroid of a guinea pig (weighing 200 g) to reach a weight of 600 mg.

unit of thyrotrophic activity

An obsolete, non-SI (International System), semi-quantitative unit corresponding to the amount of adenohyophysis extract required by an immature 200 g guinea pig to result in thyroid gland with a final weight of 600 mg.