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Synonyms

excitability

American  
[ik-sahy-tuh-bil-i-tee] / ɪkˌsaɪ təˈbɪl ɪ ti /

noun

  1. the quality of being excitable.

  2. Physiology. irritability.


Other Word Forms

  • unexcitability noun

Etymology

Origin of excitability

First recorded in 1780–90; excitable + -ity

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Researchers looked at problem behaviour such as a fear of traffic or loud noises, separation-related issues or excitability.

From BBC • Mar. 18, 2026

His team used a genetically modified mouse model that overexpresses the Grik4 gene, which increases the production of GluK4-type glutamate receptors and heightens neuronal excitability.

From Science Daily • Nov. 4, 2025

That is a version of neurodivergence over excitability, high-achieving, profound subtle awareness and attunement.

From Los Angeles Times • Oct. 15, 2025

"The ketogenic diet has been proven to be effective for treatment-resistant epileptic seizures by reducing the excitability of neurons in the brain," Sethi said.

From Science Daily • Apr. 1, 2024

“My assessment,” the doctor writes, “is that he will be able to recover in a short time, while retaining the extreme excitability that must form the essence of his character.”

From "Vincent and Theo: The Van Gogh Brothers" by Deborah Heiligman