hyperreactive

adjective

hy·​per·​re·​ac·​tive ˌhī-pər-rē-ˈak-tiv 

variants or hyper-reactive

: having or showing abnormally high sensitivity to stimuli

Because of their association with the trauma, many victims seem to be hyperreactive to sounds and sights other children don't respond to.

—Kate McGraw

… production of free radicals: hyper-reactive molecules that can attack proteins, nucleic acids, or lipids that have the misfortune to be nearby.

—Robert Taylor

hyperreactivity

ˌhī-pər-(ˌ)rē-ˌak-ˈti-və-tē 

noun

or hyper-reactivity

hyperreactivity of airways in asthma

sensory hyper-reactivity

Word History

First Known Use

1932, in the meaning defined above

Medical Definition

hyperreactive

adjective

hy·​per·​re·​ac·​tive -rē-ˈak-tiv 

variants also hyper-reactive

: having or showing abnormally high sensitivity to stimuli

Because of their association with the trauma, many victims seem to be hyperreactive to sounds and sights other children don't respond to.

—Kate McGraw, The News Journal (Wilmington, Delaware)

Interior surface cells of the bronchial passages were destroyed and the airways became hyper-reactive to outside stimuli.

—Harold M. Schmeck, Jr., The New York Times

hyperreactivity

-(ˌ)rē-ˌak-ˈtiv-ət-ē 

noun

also hyper-reactivity

plural hyperreactivities

bronchial hyperreactivity