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Definitions

chemical reaction

[kem-i-kuhl ree-ak-shuhn] / ˈkɛm ɪ kəl riˈæk ʃən /
NOUN
chain reaction
Synonyms
STRONGEST
vicious circle
WEAK
causal nexus cause and effect chain of circumstances concatenation of events domino effect powder train ripples in a pond

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.

Form’s iron-air batteries generate electricity through a chemical reaction involving oxygen, water and iron powder that mimics how old pieces of metal gather rust.

From Barron's • Feb. 24, 2026

Earlier this year, the South Coast air district learned about another fiery chemical reaction brewing inside El Sobrante Landfill in Corona.

From Los Angeles Times • Nov. 19, 2025

The researchers found that certain phosphate groups in DNA can pull in positively charged molecules during a chemical reaction, helping them align correctly -- much like a magnet drawing a metal bead into place.

From Science Daily • Nov. 8, 2025

Scunthorpe's furnaces produce molten iron by splitting rocks containing iron ore in a chemical reaction that requires intense heat.

From BBC • Apr. 14, 2025

“Pressure brings it up. It results from a chemical reaction in the lungs when water mixes with air and mucus.”

From "Snow Falling on Cedars: A Novel" by David Guterson