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double bond

noun Chemistry.
  1. a chemical linkage consisting of two covalent bonds between two atoms of a molecule, represented in chemical formulas by two lines, two dots, or four dots, as CH2=CH2; CH2:CH2; CH2::CH2.
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Origin of double bond

First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for double bond

Historical Examples

  • Petroleum when cracked up to make gasoline gives isoprene or other double-bond compounds that go over into some form of rubber.

    Creative Chemistry

    Edwin E. Slosson


British Dictionary definitions for double bond

double bond

noun
  1. a type of chemical bond consisting of two covalent bonds linking two atoms in a molecule
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

double bond in Medicine

double bond

n. Symbol Δ
  1. A covalent bond in which two electron pairs are shared between two atoms.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

double bond in Science

double bond

[dŭbəl]
  1. A type of covalent bond in which two electron pairs are shared between two atoms. Each atom contributes two electrons to the bond. See more at covalent bond.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.