Dictionary
hy•per•thy•roid•ism
Pronunciation: (hī"pur-thī'roi-diz"um), [key]—
n. Pathol.
1. overactivity of the thyroid gland.
2. a condition resulting from this, characterized by increased metabolism and exophthalmos.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.