chemical reaction

[ kem-i-kuhl ree-ak-shuhn ]

noun

1. Chemistry. reaction ( def 7 ).

chemical reaction

noun

1. a process that involves changes in the structure and energy content of atoms, molecules, or ions but not their nuclei Compare nuclear reaction

chemical reaction

1. A process in which atoms of the same or different elements rearrange themselves to form a new substance. While they do so, they either absorb heat or give it off.

Word History and Origins

Origin of chemical reaction¹

First recorded in 1780–90

Example Sentences

The intense, laserlike x-rays are siphoned off into 14 beamlines that scientists will use to image materials and biological structures at atomic to nanometer scales and take snapshots of chemical reactions over nanosecond time frames.

From Science Magazine

Protein design aims to create customized antibodies for therapies, biosensors for diagnostics, or enzymes for chemical reactions.

From Science Daily

Surfaces play a key role in numerous chemical reactions, including catalysis and corrosion.

From Science Daily

They introduced an iodine-reducing agent to inhibit the chemical reactions that cause the cells to degrade over time.

From Science Daily

These high concentrations result in unique chemical reactions within cancer cells that render the cells more vulnerable to chemo- and radiation therapies.

From Science Daily

Related Words

• vicious circle