Dictionary
underactive
adjective un·der·ac·tive \-ˈak-tiv\
: not active enough
Full Definition of UNDERACTIVE
: characterized by an abnormally low level of activity <an underactive thyroid gland>
— un·der·ac·tiv·i·ty \-ˈti-və-tē\ noun
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First Known Use of UNDERACTIVE
1959
Medical Dictionary
underactive
adjective un·der·ac·tive \-ˈak-tiv\
Medical Definition of UNDERACTIVE
: characterized by an abnormally low level of activity <an underactive thyroid gland>
—un·der·ac·tiv·i·ty \-ak-ˈtiv-ət-ē\ noun, plural un·der·ac·tiv·i·ties
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