hyporeactive in English dictionary hyporeactive Meanings and definitions of "hyporeactive" (biology) Having or showing abnormally low sensitivity to stimuli. adjective (biology) Having or showing abnormally low sensitivity to stimuli. more Grammar and declension of hyporeactive hyporeactive ( comparative more hyporeactive, superlative most hyporeactive) hyporeactive (comparative more hyporeactive, superlative most hyporeactive) more Sample sentences with "hyporeactive" Declension Stem Try again Authors