hypofunction

noun
hy·​po·​func·​tion | \ ˈhī-pō-ˌfəŋ(k)-shən How to pronounce hypofunction (audio) \

Medical Definition of hypofunction

: decreased or insufficient function especially of an endocrine gland endocrine hypofunction resulting from hypophysial or hypothalamic sarcoidosis— A. T. Cariski