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reactivity

[ ree-ak-tiv-i-tee ]
/ ˌri ækˈtɪv ɪ ti /
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noun

the quality or condition of being reactive.
Chemistry. the relative capacity of an atom, molecule, or radical to undergo a chemical reaction with another atom, molecule, or compound.
Physics. a measure of the deviation from the condition at which a nuclear reactor is critical.
Immunology. the ability of an antigen to combine with an antibody.

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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

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Origin of reactivity

First recorded in 1885–90; reactive + -ity

OTHER WORDS FROM reactivity

hy·per·re·ac·tiv·i·ty, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for reactivity

Medical definitions for reactivity

reactivity
[ rē′ăk-tĭvĭ-tē ]

n.

The property of reacting.
The process of reacting.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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