Deficiency of thyroid hormone. ... (12 Dec 1998) ... 
(hi″po-thi´roid) marked by hypothyroidism; called also thyroprival and thyroprivic.
Type: Term Pronunciation: hī′pō-thī′royd Definitions: 1. Marked by reduced thyroid function.
Having deficient thyroid levels, either from overt thyroid disease like myxedema, a generally low metabolism from functional causes, or subsequent to emotional depression or the use of depressant drugs.
Deficiency of thyroid hormone normally made by the thyroid gland, located at the front of the neck. Hypothyroidism can result in hair loss.
Low function of the thyroid gland.