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Reactivity (Noun)

Responsive to stimulation.

Nouns denoting cognitive processes and contents.

The skin's reactivity to allergens was evident in the sudden rash that appeared after exposure.
Researchers studied the reactivity of nerve cells to different sensory inputs in the brain.
The high reactivity of the patient's immune system made it difficult to find a suitable transplant match.
The company developed a new material with reduced reactivity to extreme temperatures, making it ideal for aerospace applications.
The infant's reactivity to loud noises was evident in the way she startled at the sound of a fire alarm.