double bond


Definition of double bond

: a chemical bond in which two pairs of electrons are shared by two atoms in a molecule — compare single bond, triple bond

Examples of double bond in a Sentence

Recent Examples on the Web In recent years investigators have developed photocatalysts that break the resistant double bond between carbon and oxygen in carbon dioxide. Javier Garcia Martinez, Scientific American, "Sun-Powered Chemistry Can Turn Carbon Dioxide into Common Materials," 10 Nov. 2020 The melting point of a fat is linked to its level of saturation — the number of single bonds versus double bonds in its fatty-acid chain. J. Kenji López-alt, New York Times, "How Do They Make Plant-Based Meat Behave Like Beef?," 3 Mar. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'double bond.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of double bond

1889, in the meaning defined above

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The first known use of double bond was in 1889

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Cite this Entry

“Double bond.” Dictionary, Merriam-Webster, Accessed 14 Apr. 2021.

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More Definitions for double bond

double bond


English Language Learners Definition of double bond

technical : a chemical bond in which two atoms in a molecule share two pairs of electrons

double bond


Medical Definition of double bond

: a chemical bond in which two pairs of electrons are shared by two atoms in a molecule and which is usually represented in chemical formulas by two lines (as in the formula for ethylene H2C=CH2) — compare triple bond — see unsaturated sense b

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