subnormal /ˌsʌbˈnoɚməl/ adjective Learner's definition of SUBNORMAL
technical
1
: lower or smaller than normal低于正常水平的；正常值以下的 -
subnormal body temperature低于正常水平的体温
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subnormal levels of vitamin C偏低的维生素C含量
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subnormal intelligence智力低下
2
: having less of something than is normal缺少的；不足的