hypothyroidism
Concise Oxford English Dictionary © 2008 Oxford University Press:
hypothyroidism /ˌhʌɪpəʊˈθʌɪrɔɪdɪz(ə)m/
▶noun Medicine abnormally low activity of the thyroid gland, resulting in retardation of growth and mental development.
– derivatives
hypothyroid noun & adjective.
hypothyroid noun & adjective.
'hypothyroidism' also found in these Oxford entries:

